Ericsson ECP-206 Certification All-in-One Exam Guide Jun-2024 [Q29-Q53]

Ericsson ECP-206 Certification All-in-One Exam Guide Jun-2024

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NEW QUESTION # 29
Which router function advertises external routes in OSPF?

• A. ASBR
• B. ABR
• C. backbone router
• D. designated router

Answer: A

Explanation:
Explanation
The router function that advertises external routes in OSPF is ASBR, which stands for Autonomous System Boundary Router. An ASBR is a router that connects an OSPF domain to another routing domain, such as another OSPF domain or a different routing protocol domain. An ASBR can redistribute routes from other routing domains into OSPF as external routes, which are carried in type 5 or type 7 LSAs. External routes have two types: E1 and E2. E1 routes include the cost from the ASBR to the destination, while E2 routes only include the cost advertised by the ASBR34.
References: OSPF External Routes IpCisco, OSPF External Route selection algorithm - Cisco Community

NEW QUESTION # 30
What is the function of LSR from an LDP perspective?

• A. The LSR distributes labels of LDP to its FEC peers.
• B. The LSR distributes labels of FEC to its LDP peers.
• C. The LSR distributes packets of FEC to its LDP peers.
• D. The LSR distributes packets of LDP to its FEC peers.

Answer: B

Explanation:
Explanation
The function of LSR from an LDP perspective is to distribute labels of FEC to its LDP peers. LSR stands for Label Switching Router, which is a router that forwards packets based on labels rather than IP addresses in an MPLS network. LDP stands for Label Distribution Protocol, which is a protocol that distributes labels for MPLS forwarding along the shortest path calculated by an IGP. FEC stands for Forwarding Equivalence Class, which is a group of packets that are forwarded in the same manner by an LSR. An LSR uses LDP to advertise the label mappings for each FEC to its LDP peers, which are other LSRs that have established an LDP session with it12.
References: Ldp | Microsoft Learn, Label Distribution Protocol - Wikipedia

NEW QUESTION # 31
Which two protocols apply to both IPv4 and IPv6? (Choose two.)

• A. SNMP
• B. DNS
• C. ARP
• D. MD

Answer: A,B

Explanation:
Explanation
Two protocols that apply to both IPv4 and IPv6 are:
SNMP: This stands for Simple Network Management Protocol, which is a protocol that allows network administrators to monitor and manage network devices such as routers, switches, servers, printers, etc.
SNMP uses a client-server model, where an SNMP manager (client) can query or configure an SNMP agent (server) on a network device using SNMP messages. SNMP can operate over both IPv4 and IPv6 networks56.
DNS: This stands for Domain Name System, which is a protocol that translates human-readable domain names (such as www.example.com) into numerical IPaddresses (such as 192.0.2.1 or 2001:db8::1) that identify network devices. DNS uses a hierarchical distributed database of name servers that store and resolve domain names and IP addresses. DNS can support both IPv4 and IPv6 addresses78.
References: Simple Network Management Protocol - Wikipedia, SNMP over IPv6 - Cisco, Domain Name System - Wikipedia, DNS for IPv6 - Cisco

NEW QUESTION # 32
What are two roles of the DHCP protocol in a network? (Choose two.)

• A. It is used to inform hosts about the default gateway.
• B. It is used by hosts to obtain the IP address and other parameters from the DHCP server.
• C. It provides the authorization function to the network.
• D. It provides information about the number of hops between the source and the destination.

Answer: A,B

Explanation:
Explanation
Two roles of the DHCP protocol in a network are:
It is used by hosts to obtain the IP address and other parameters from the DHCP server. DHCP stands for Dynamic Host Configuration Protocol, which is a protocol that provides automatic and centralized management of IP addresses and other network configuration parameters for devices connected to a network. A host that needs an IP address can send a request to a DHCP server, which will assign an available IP address from a pool and lease it to the host for a certain period of time34.
It is used to inform hosts about the default gateway. The default gateway is the IP address of the router that connects the host to other networks. The default gateway is one of the parameters that can be delivered by the DHCP server to the host, along with other parameters such as subnet mask, DNS server, domain name, etc. The host can use the default gateway to send packets to destinations outside of its local network34.
References: What Is DHCP? (Dynamic Host Configuration Protocol) - Lifewire, Dynamic Host Configuration Protocol - Wikipedia

NEW QUESTION # 33
Which network is reserved as a private network according to RFC1918?

• A. 172.15.1.0/24
• B. 10.254.1.0/24
• C. 172.16.1.0/9
• D. 193.168.1.0/24

Answer: B

Explanation:
Explanation
According to RFC1918, there are three network blocks reserved as private networks that are not allocated to any specific organization and are not routable on the public Internet. These are:
10.0.0.0/8 (10.0.0.0 - 10.255.255.255)
172.16.0.0/12 (172.16.0.0 - 172.31.255.255)
192.168.0.0/16 (192.168.0.0 - 192.168.255.255)
Out of these, only option B (10.254.1.0/24) falls within one of the private network blocks (10.0.0.0/8). Option A (172.16.1.0/9) is not valid because it exceeds the /12 prefix length of the private network block (172.16.0.0/12). Option C (193.168.1.0/24) is not valid because it does not belong to any of the private network blocks, and is actually assigned to RIPE NCC as a public network block . Option D (172.15.1.0/24) is also not valid because it does not belong to any of the private network blocks, and is actually assigned to ARIN as a public network block . References: RFC 1918: Address Allocation for Private Internets, Private network - Wikipedia, [RIPE NCC IPv4 Address Space Chart], [ARIN WHOIS Database Search]

NEW QUESTION # 34
Which two statements are true about priority queuing (PQ)? (Choose two.)

• A. Traffic in all queues are always guaranteed a minimum bandwidth.
• B. Traffic in the highest priority queue is only reserved for voice traffic.
• C. Traffic in the highest priority queue will experience the least amount of jitter and delay compared to traffic in the other queues.
• D. Traffic in lower priority queues can be starved of bandwidth.

Answer: C,D

Explanation:
Explanation
Priority queuing (PQ) is a queuing method that establishes four interface output queues that serve different priority levels: high, medium, normal, and low. Traffic in the highest priority queue will experience the least amount of jitter and delay compared to traffic in the other queues, because PQ always services the higher-priority queues first. However, this can also cause traffic in lower priority queues to be starved of bandwidth, especially if the highest priority queue is oversubscribed. Traffic in the highest priority queue is not only reserved for voice traffic, but can also include network control and routing traffic. Traffic in all queues are not always guaranteed a minimum bandwidth, because PQ does not provide any bandwidth reservation mechanism. References: Quality of Service (QoS) Queues and Queuing Explained, Chapter:
Configuring Priority Queueing - Cisco

NEW QUESTION # 35
In an Ethernet frame carrying a VLAN tag, where does the VLAN tag appear?

• A. before the length field
• B. before the type field
• C. after the length field
• D. after the type field

Answer: B

Explanation:
Explanation
In an Ethernet frame carrying a VLAN tag, the VLAN tag appears before the type field. A VLAN tag is a
4-byte field that is inserted into an Ethernet frame to indicate the VLAN membership and priority of the frame.
The VLAN tag consists of two subfields: the tag protocol identifier (TPID) and the tag control information (TCI). The TPID subfield is a 16-bit field that identifies the frame as an IEEE 802.1Q-tagged frame, with a value of 0x8100. The TCI subfield is a 16-bit field that contains the priority code point (PCP), the drop eligible indicator (DEI), and the VLAN identifier (VID). The VLAN tag appears between the source MAC address and the type fields of the original frame, shifting the type field by four bytes. The type field indicates the type of the payload, such as IP or ARP .
References: [IEEE 802.1Q - Wikipedia], [VLAN Tagging Explained with DTP Protocol - GeeksforGeeks]

NEW QUESTION # 36
P routers forward packets based on the ______.

• A. inner label
• B. LSP label
• C. VPN label
• D. flow label

Answer: B

Explanation:
Explanation
P routers forward packets based on the LSP label. The LSP label is the label that corresponds to the label-switched path (LSP) that is established between two PE routers in an MPLS network. The LSP label is also called the outer label or the transport label, because it is used to transport packets across the MPLS core network. P routers are also called LSRs (label switch routers) or transit routers, because they switch packets based on their labels or remove the labels. P routers do not need to look at the IP header or any other information in the packet, except for the top label in the label stack. P routers perform one of three possible operations on labels: swap, pop, or PHP (penultimate hop popping). In a swap operation, the label is swapped with a new label, and the packet is forwarded along the path associated with the new label. In a pop operation, the label is removed from the packet, and the packet is forwarded based on its IP header or another label in the stack. In a PHP operation, the label is removed from the packet at the last P router before reaching the egress PE router, and the packet is forwarded without any label to the egress PE router.
The LSP label is different from other types of labels that may be used in MPLS networks, such as VPN labels or service labels. These labels are used to identify different VPNs or services that run over MPLS networks, such as Layer 2 VPNs, Layer 3 VPNs, traffic engineering, or QoS. These labels are also called inner labels or payload labels, because they are related to the payload of the packet. These labels are not used by P routers for forwarding decisions, but only by PE routers for delivering packets to their destinations.
Therefore, the answer is C.
References: Ericsson IP Networking - Routing Protocols, MPLS Fundamentals: Forwarding Labeled Packets - Cisco Press, MPLS Labels and Devices - NetworkLessons.com, Multiprotocol Label Switching - Wikipedia, VPN Packet Forwarding > MPLS/VPN Architecture Overview | Cisco Press, Basic concepts - Hewlett Packard Enterprise

NEW QUESTION # 37
Which protocol would be used to bundle multiple Ethernet ports into a virtual link with an aggregated bandwidth?

• A. VRRP
• B. LACP
• C. ERP
• D. RSTP

Answer: B

Explanation:
Explanation
The protocol that would be used to bundle multiple Ethernet ports into a virtual link with an aggregated bandwidth is LACP, which stands for Link Aggregation Control Protocol. LACP is a protocol that allows two or more devices to negotiate the formation of a link aggregation group (LAG), also known as an EtherChannel or a port channel. A LAG combines multiple physical links into one logical link that provides increased bandwidth, load balancing, and redundancy. LACP is defined in IEEE 802.3ad and 802.1AX standards12.
References: Link Aggregation Control Protocol - Wikipedia, What is "link aggregation" and how does it benefit your network? | PC Gamer

NEW QUESTION # 38
In OSPFv2, which route characteristic is used to determine the best path?

• A. delay
• B. cost
• C. packet loss
• D. jitter

Answer: B

Explanation:
Explanation
In OSPFv2, the route characteristic that is used to determine the best path is the cost. The cost is a metric that represents the link bandwidth, delay, reliability, or other factors. The cost is inversely proportional to the bandwidth, meaning that a higher bandwidth link has a lower cost. The cost of a route is calculated by adding the costs of all links along the path. OSPFv2 uses the following formula to calculate the cost of an interface:
Cost = Reference bandwidth / Interface bandwidth in bps
The reference bandwidth is a constant value that can be configured by the network administrator. By default, it is 100 Mbps. The interface bandwidth is the actual bandwidth of the interface in bits per second. For example, if an interface has a bandwidth of 10 Mbps, its cost would be 100 Mbps / 10 Mbps = 101415.
OSPFv2 does not use jitter, packet loss, or delay as route characteristics to determine the best path. Jitter is the variation in latency or delay between packets. Packet loss is the percentage of packets that are dropped or corrupted during transmission. Delay is the time it takes for a packet to travel from source to destination. These characteristics are not part of the OSPFv2 protocol and are not advertised in OSPFv2 LSAs1617.
References: OSPF Metric cost Calculation Formula Explained - ComputerNetworkingNotes, OSPF Cost - OSPF Routing Protocol Metric Explained - Study-CCNA, Open Shortest Path First - Wikipedia, OSPF Metric
= Cost - Cisco

NEW QUESTION # 39
Review the exhibit.

A service provider wants to provide L3VPN for two customers (indicated by red and green in the exhibit).
Referring to the exhibit, which statement is correct?

• A. The two customers cannot use overlapping IP prefixes.
• B. The service provider's P routers are not aware of the customers' routes.
• C. LDP must be configured between PE and CE
• D. MP-BGP should be configured on all the service provider's routers (Ps and PEs).

Answer: B

Explanation:
Explanation
Referring to the exhibit, the correct statement is that the service provider's P routers are not aware of the customers' routes. This is because P routers only need to forward MPLS packets based on their labels, without looking into their IP headers or VPN information. The P routers do not have any VRFs configured for the customers, nor do they participate in MP-BGP sessions with other PE routers. The PE routers are responsible for maintaining VRFs for each customer and for exchanging VPN routes with other PE routers using MP-BGP910.
References: Layer 3 VPNs (L3VPN) - Cisco, MPLS VPN - Wikipedia

NEW QUESTION # 40
What is a reason for using VLANs in an IP network?

• A. to implement virtual routing
• B. to enable MAC address learning on a router port
• C. to isolate hosts across multiple IP subnets
• D. to isolate hosts within the same IP subnet

Answer: D

Explanation:
Explanation
A reason for using VLANs in an IP network is to isolate hosts within the same IP subnet. VLANs (Virtual LANs) are logical grouping of devices in the same broadcast domain. VLANs are usually configured on switches by placing some interfaces into one broadcast domain and some interfaces into another. Each VLAN acts as a subgroup of the switch ports in an Ethernet LAN. VLANs allow network administrators to group hosts together even if the hosts are not directly connected to the same network switch. By using VLANs, hosts within the same IP subnet can be separated into different broadcast domains, which enhances security, reduces network congestion, and simplifies network management78.
References: 8 Different Types of VLANs in TCP/IP Networks, What is a VLAN? - Study-CCNA

NEW QUESTION # 41
IPv6 link-local addresses are designed to be used in which three situations? (Choose three.)

• A. addressing on a single link for purposes such as auto-address configuration
• B. by routers to forward packets with link-local source addresses to other links
• C. for local IP communication on the IPv6 capable routers
• D. for neighbor discovery
• E. when routers are not present

Answer: A,C,D

Explanation:
Explanation
IPv6 link-local addresses are designed to be used in three situations: for neighbor discovery, for local IP communication on the IPv6 capable routers, and for addressing on a single link for purposes such as auto-address configuration. Neighbor discovery is a protocol that allows IPv6 nodes to discover each other and learn their link-layer addresses on a local network. Neighbor discovery uses link-local addresses to send and receive messages such as router advertisements, router solicitations, neighbor advertisements, and neighbor solicitations34. Local IP communication on the IPv6 capable routers refers to the ability of routers to exchange routing information or management traffic using their link-local addresses as source and destination addresses. This reduces the need for global unicast addresses on router interfaces that are not reachable from outside the local network35. Addressing on a single link for purposes such as auto-address configuration refers to the use of link-local addresses to enable IPv6 nodes to obtain an address without manual configuration or a DHCP server. Link-local addresses can be automatically derived from the interface identifier in the modified EUI-64 format or randomly generated. Link-local addresses can also be used to test the connectivity of a link before obtaining a global unicast address36.
References: Understand the IPv6 Link-Local Address - Cisco, Link Local Address - GeeksforGeeks, IPv6 Address Types | Link-Local, Global Unicast, etc. IPCisco, MPLS Label Distribution Protocol Commands - Cisco

NEW QUESTION # 42
Which two statements are true regarding the LSP? (Choose two.)

• A. The LSP refers to a sequence of routers that add. remove, or change label values along the path.
• B. The LSP refers to a sequence of routers that forward the MPLS packet based on labels.
• C. The LSP refers to a specific label assigned to a packet by the LSR for a destination.
• D. The LSP refers to a sequence of routers that add, remove, or change label values based on the destination MAC address.

Answer: A,B

Explanation:
Explanation
Two statements that are true regarding the LSP are:
The LSP refers to a sequence of routers that forward the MPLS packet based on labels. An LSP is a Label Switched Path, which is a path through an MPLS network that is established by signaling protocols such as LDP or RSVP-TE. An LSP consists of a sequence of routers (called Label Switching Routers or LSRs) that forward packets based on labels rather than IP addresses. Labels are short fixed-length identifiers that are attached to packets at the ingress router and removed at the egress router. Labels can be swapped or popped at intermediate routers according to their label forwarding tables78.
The LSP refers to a sequence of routers that add, remove, or change label values along the path. As mentioned above, an LSP consists of a sequence of routers that forward packets based on labels. Along the path, different routers may perform different operations on the labels depending on their role and configuration. The ingress router adds one or more labels to the packet before sending it into the MPLS network. The egress router removes all labels from the packet before sending it out of the MPLS network. The intermediate routers may swap one label with another label according to their label forwarding tables. This process is called label switching78.
References: MPLS Fundamentals: 3 - MPLS Packet Forwarding, Multiprotocol Label Switching - Wikipedia

NEW QUESTION # 43
What is the subnet address for 10.57.126.156/29?

• A. 10.57.126.144
• B. 10.57.126.156
• C. 10.57.126.0
• D. 10.57.126.152

Answer: D

Explanation:
Explanation
The subnet address for 10.57.126.156/29 is 10.57.126.152. To find the subnet address, we need to perform a bitwise AND operation between the IP address and the subnet mask. The subnet mask for /29 is
255.255.255.248, which in binary is 11111111.11111111.11111111.11111000. The IP address in binary is
00001010.00111001.01111110.10011100. The result of the AND operation is
00001010.00111001.01111110.10011000, which in decimal is10.57.126.152. References: Ericsson IP Networking - IP Addressing, Software Installation and Upgrade Overview (Junos OS)

NEW QUESTION # 44
What does an LDP implicit null label cause?

• A. penultimate hop popping by an upstream router
• B. penultimate hop popping by a downstream router
• C. swapping with a new label
• D. forwarding the packet unchanged

Answer: B

Explanation:
Explanation
An LDP implicit null label causes penultimate hop popping by a downstream router. LDP is a protocol that distributes labels for MPLS forwarding along the shortest path calculated by an IGP. An implicit null label is a special label value of 3 that indicates that the downstream router does not need a label to forward the packet to its destination. When an upstream router receives an implicit null label from a downstream router, it removes (or pops) the label from the packet before sending it to the downstream router. This process is called penultimate hop popping (PHP) and it reduces the load on the downstream router, which can forward the packet based on its IP header or another label in the stack59.
References: MPLS Label Distribution Protocol Commands - Cisco, Solved: Implicit null and Explicit null - Cisco Community

NEW QUESTION # 45
Review the exhibit.

Given the routing table shown in the exhibit, what is the next-hop to reach the host 192.168.1.129?

• A. 10.126.131.250
• B. 10.126.131.252
• C. 10.126.131.251
• D. 10.126.131.248

Answer: A

Explanation:
Explanation
The next-hop to reach the host 192.168.1.129 is 10.126.131.250. This can be determined by looking at the routing table in the exhibit. The host 192.168.1.129 falls within the range of the network 192.168.1.64/26, which has a next-hop of 10.126.131.250. References: Ericsson IP Networking - IP Addressing, Software Installation and Upgrade Overview (Junos OS)

NEW QUESTION # 46
Which operating system is used in Ericsson Router 6000 products?

• A. SE-OS
• B. ERS
• C. ERS
• D. IPOS
• E. Junos

Answer: C

Explanation:
Explanation
The operating system used in Ericsson Router 6000 products is ERS (Ericsson Router Software). ERS is based on IPOS (IP Operating System), which is a common operating system for Ericsson's IP portfolio. ERS provides advanced features and functionality for IP transport, such as MPLS, Segment Routing, QoS, IPSec, synchronization, SDN, and more. ERS also supports seamless integration with Ericsson Radio System and Ericsson Network Manager.
References: Router 6000 Series - Ericsson, Router 6675 Datasheet - Winncom

NEW QUESTION # 47
Which two statements are correct for LDP? (Choose two.)

• A. LSRs use TCP to negotiate LDP session parameters.
• B. LSRs use UDP for session establishment.
• C. LSRs send ICMP hello messages for neighbor discovery
• D. LSRs send UDP hello messages for neighbor discovery.

Answer: A,D

Explanation:
Explanation
Two statements that are correct for LDP are:
LSRs send UDP hello messages for neighbor discovery. LDP is a protocol that distributes labels for MPLS forwarding along the shortest path calculated by an IGP. LDP uses two types of messages:
discovery messages and session messages. Discovery messages are used to discover and maintain adjacency with other LSRs that support LDP. Discovery messages are sent as UDP datagrams to the well-known multicast address 224.0.0.2 (all routers on this subnet) on port 64634.
LSRs use TCP to negotiate LDP session parameters. Session messages are used to establish, maintain, and terminate LDP sessions between LSRs. Session messages are also used to exchange label mappings, notification messages, and keepalive messages. Session messages are sent as TCP segments to port
64634.
References: Ldp | Microsoft Learn, Label Distribution Protocol - Wikipedia

NEW QUESTION # 48
In your network, video traffic is being marked with DSCP code AF31.
Based on industry standard practice, which code would you use to assign higher priority to VoIP traffic?

• A. AF21
• B. AF11
• C. DF
• D. EF

Answer: D

Explanation:
Explanation
The code that is commonly used to assign higher priority to VoIP traffic is EF, which stands for Expedited Forwarding. EF is a per-hop behavior (PHB) defined by the Differentiated Services (DiffServ) model for QoS.
EF provides low delay, low jitter, and low loss for real-time applications such as VoIP. EF is marked by setting the DSCP value to 101110, which corresponds to decimal 4678. AF31, which stands for Assured Forwarding class 3 low drop probability, is another PHB defined by DiffServ, but it provides lower priority than EF. AF31 is marked by setting the DSCP value to 011010, which corresponds to decimal 2678. DF, which stands for Default Forwarding, is a PHB defined by DiffServ that provides best-effort service for unmarked traffic. DF is marked by setting the DSCP value to 000000, which corresponds to decimal 078.
AF11, which stands for Assured Forwarding class 1 low drop probability, is another PHB defined by DiffServ, but it provides lower priority than EF and AF31. AF11 is marked by setting the DSCP value to 001010, which corresponds to decimal 1078.
References: Differentiated services - Wikipedia, Solved: Cisco VoIP Phone traffic marking - Cisco Community

NEW QUESTION # 49
Within an IGP area, which two statements are correct? (Choose two.)

• A. Routers advertise information about themselves.
• B. Routers summarize information they learn from neighbors.
• C. Routers discard valid but inaccurate information from neighbors.
• D. Routers relay information delivered by neighbors.

Answer: A,D

Explanation:
Explanation
Within an IGP area, routers advertise information about themselves and relay information delivered by neighbors. This is how link-state routing protocols such as OSPF and IS-IS work. They flood information about the network topology to all routers in the same area or domain. That information is then used to build a complete network connectivity map and to calculate the shortest path to destinations. Routers do not summarize or discard information within an area, unless they are configured to do so by some filtering mechanism. References: Ericsson IP Networking - Routing Protocols, IP Routing: ISIS Configuration Guide - IS-IS Overview and Basic Configuration

NEW QUESTION # 50
What is the purpose of penultimate hop popping?

• A. to reduce the load on the LSR
• B. to reduce the load on the LSP
• C. to reduce the load on the LER
• D. to reduce the load on the LDP

Answer: C

Explanation:
Explanation
Penultimate hop popping (PHP) is a function performed by certain routers in an MPLS enabled network. It refers to the process whereby the outermost label of an MPLS tagged packet is removed by a label switch router (LSR) before the packet is passed to an adjacent label edge router (LER). The purpose of PHP is to reduce the load on the LER, as it saves one cycle of label lookup. The LER can forward the packet based on its IP header or another label in the stack, without having to process the outer label. PHPfunctionality is achieved by the LER advertising a label with a value of 3 to its neighbors. This label is defined as "implicit-null" and informs the neighboring LSRs to perform PHP12.
References: Penultimate hop popping - Wikipedia, MPLS Penultimate hop popping - NetworkLessons.com

NEW QUESTION # 51
Which statement accurately defines an Autonomous System (AS)?

• A. An AS is a set of routers under a single administration, using an interior gateway protocol and common metrics to route packets within the AS.
• B. An AS is a collection of IS-IS routes imported into BGP and presented in such a way that networks connected to the AS have a global overview of the network.
• C. An AS is a network that is capable of autonomously forwarding packets, regardless of direct or indirect connectivity to the Internet.
• D. An AS is a group of networks directly connected to each other that can distribute eBGP information using directly established links.

Answer: A

Explanation:
Explanation
The statement that accurately defines an Autonomous System (AS) is that an AS is a set of routers under a single administration, using an interior gateway protocol and common metrics to route packets within the AS.
An AS is a logical grouping of networks that share a common routing policy and operate under a single administrative authority. An AS can be a single network or a collection of networks that are interconnected by routers. An AS uses an interior gateway protocol (IGP), such as OSPF or IS-IS, to exchange routing information within the AS. An IGP uses common metrics, such as hop count or bandwidth, to determine the best path to each destination within the AS. An AS also has a unique number assigned by IANA, called an AS number (ASN), which identifies the AS in interdomain routing .
References: [Autonomous system (Internet) - Wikipedia], [What Is an Autonomous System? - Cisco]

NEW QUESTION # 52
A network operator wants to make sure voice data is prioritized.
In this scenario, to which Ethernet traffic class should it be assigned.

• A. 0
• B. 1
• C. 2
• D. 3

Answer: D

Explanation:
Explanation
A network operator who wants to make sure voice data is prioritized should assign it to Ethernet traffic class 6.
Ethernet traffic class is a term used to refer to the priority code point (PCP) field in the VLAN header of an Ethernet frame. The PCP field is a 3-bit field that can encode up to eight different priority levels, ranging from
0 (lowest) to 7 (highest). The PCP values can be mapped to different types of traffic according to their QoS requirements. The recommended mapping is as follows :
PCP 0: Best effort (default)
PCP 1: Background
PCP 2: Spare
PCP 3: Excellent effort
PCP 4: Controlled load
PCP 5: Video
PCP 6: Voice
PCP 7: Network control
Voice data is a type of real-time traffic that requires the highest priority and lowest delay in the network.
Therefore, it should be assigned to PCP 6, which corresponds to Ethernet traffic class 6 .
References: [IEEE 802.1Q - Wikipedia], [What is "link aggregation" and how does it benefit your network? | PC Gamer]

NEW QUESTION # 53
......

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