[UPDATED 2024] Free Ericsson ECP-206 Exam Questions Self-Assess Preparation
ECP-206 Free Sample Questions to Practice One Year Update
NEW QUESTION # 20
What is a label-edged router (LER)?
- A. a CE router
- B. a DR router
- C. a PE router
- D. a P router
Answer: C
Explanation:
Explanation
A label-edged router (LER) is a PE router. A PE router is a provider edge router, which is a router that connects an MPLS network to a customer network. A LER is a term used in MPLS to describe a router that resides at the ingress and egress points of an MPLS network, handling both labelled and unlabelled packets. A LER performs label operations such as adding, removing, or swapping labels on packets entering or leaving the MPLS network34.
References: What is Label Edge Router (LER)? - Definition from Techopedia, LER - Label Edge Router - Mpirical
NEW QUESTION # 21
In an Ericsson Router 6000, which command is used to begin making changes to the router settings?
- A. commit
- B. set metric
- C. configure
- D. capabilities
Answer: C
Explanation:
Explanation
The command that is used to begin making changes to the router settings in an Ericsson Router 6000 is configure. This command enters the configuration mode, where various commands can be used to modify the router parameters, such as interfaces, protocols, services, security, etc. To exit the configuration mode, the command end can be used. To save the changes made in the configuration mode, the command commit can be used56.
References: Router 6000 Series - Ericsson, Ericsson Router 6000 series (6471/6672/6675) Commands for
2G/3G/4G/5G technologies... - YouTube
NEW QUESTION # 22
In an Ethernet frame carrying a VLAN tag, where does the VLAN tag appear?
- A. after the type field
- B. after the length field
- C. before the length field
- D. before the type field
Answer: D
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 # 23
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. 10.126.131.251
- B. 10.126.131.252
- C. 10.126.131.250
- D. 10.126.131.248
Answer: C
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 # 24
Review the exhibit.
In the exhibit, which action is performed by router R3 for traffic arriving from router R2 towards router R4?
- A. PHP
- B. push
- C. swap
- D. pop
Answer: A
Explanation:
Explanation
In the exhibit, the action performed by router R3 for traffic arriving from router R2 towards router R4 is PHP, which stands for penultimate hop popping. PHP is a process in which the penultimate hop router (the router before the egress router) removes the top label from an MPLS packet before forwarding it to the egress router.
This reduces the label stack depth of the packet and relieves the egress router from performing a label lookup operation. In the exhibit, router R3 is the penultimate hop for traffic arriving from router R2 towards router R4. Router R3 will perform a PHP operation, removing the top label from the incoming packet before forwarding it to router R478.
References: PHP Tutorial - W3Schools, PHP: Downloads
NEW QUESTION # 25
An IS-IS router has been assigned the NSAP address: 49.00F0.0100.5012.3010.00.
What is the Area ID to which the router belongs?
- A. 5012.3010.00
- B. 00F0 0100
- C. 49.00F0
- D. 49.00F0.0100
Answer: D
Explanation:
Explanation
The Area ID to which the router belongs is 49.00F0.0100. The Area ID is a variable-length field in the NSAP address that identifies the area to which the router belongs. The Area ID can be between 1 and 13 bytes long, but it must start and end with an octet (8 bits). The NSAP address is composed of three parts: the authority and format identifier (AFI), the area ID, and the system ID. The AFI is a one-octet field that indicates the format and authority of the rest of the address. The system ID is a fixed-length field of six octets that uniquely identifies the router within an area. The NSAP address also has a network selector (NSEL) field, which is a one-octet field that identifies the network layer service to which a packet should be sent. For IS-IS routers, the NSEL must always be 00.
In this question, the NSAP address is 49.00F0.0100.5012.3010.00. This means that:
The AFI is 49, which indicates a private address.
The Area ID is 00F0.0100, which is four octets long and starts and ends with an octet.
The system ID is 5012.3010, which is six octets long and identifies the router within the area.
The NSEL is 00, which indicates IS-IS.
Therefore, the answer is B.
References: Ericsson IP Networking - Routing Protocols, IS-IS NSAP address - Cisco Community, Understanding IS-IS NSAP Addresses - Todd Lammle, LLC, IS-IS - Nokia, Network service access point address - Wikipedia
NEW QUESTION # 26
Which two statements are true about the Ericsson Router 6000 series? (Choose two.)
- A. The Router 6000 can host containerized applications such as firewalls.
- B. The Router 6000 is solely built as a radio cell site router.
- C. The Router 6000 uses the same building practice and accessories as the Ericsson Radio System.
- D. The Router 6000 products range from all-outdoor small site routers to large aggregation routers.
Answer: C,D
Explanation:
Explanation
Two statements that are true about the Ericsson Router 6000 series are:
The Router 6000 uses the same building practice and accessories as the Ericsson Radio System. The Ericsson Radio System is a modular and scalableradio access network solution that supports multiple standards, bands, and layers. The Router 6000 series is fully integrated into the Ericsson Radio System, using the same building practice and accessories such as mounting kits, cables, power supplies, etc. This simplifies installation, operation, and maintenance of both radio and transport equipment78.
The Router 6000 products range from all-outdoor small site routers to large aggregation routers. The Router 6000 series consists of three main products: the Router 6672 for access, the Router 6675 for pre-aggregation, and the Router 6274 for metro aggregation. The Router 6672 is an all-outdoor small cell site router with high-capacity and low-power consumption. The Router 6675 is a combined access and E-RAN switch with hardware-accelerated IPSec and high-accuracy internal clock. The Router 6274 is a high-capacity metro aggregation router with SDN functionality and flexible interface options78.
References: Router 6000 Series - Ericsson, New Ericsson Router 6000 series couples radio and IP transport for 5G future - Global Brands Magazine
NEW QUESTION # 27
What is the maximum number of unique VLAN IDs available?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
Explanation
The maximum number of unique VLAN IDs available is 4096. A VLAN ID is a 12-bit identifier that can range from 0 to 4095. However, VLAN ID 0 is reserved for tagging the priority of frames and VLAN ID 4095 is reserved for implementation use, so only VLAN IDs from 1 to 4094 are available for user configuration78.
VLAN IDs are used to identify different broadcast domains or subnets on a Layer 2 network. VLAN IDs are carried in the IEEE 802.1Q tag in the Ethernet frame header.
References: What is a virtual LAN (VLAN) and how does it work with my managed switch? - NETGEAR Support, Virtual LANs (VLANs) - Cisco
NEW QUESTION # 28
Which two label actions are performed by a P router? (Choose two.)
- A. drop
- B. php
- C. swap
- D. push
Answer: B,C
Explanation:
Explanation
A P router is a provider router that is part of the service provider's core network in an MPLS environment. A P router does not have any customer routes or VPN information, but only has information about how to reach other P routers and PE routers in the same MPLS domain. A P router performs label switching, which means that it forwards labeled packets based on their top label in the label stack. A P router can perform two possible label actions:
Swap: The P router replaces the incoming label with a new label that corresponds to the next hop along the label-switched path (LSP). The new label is determined by looking up the label forwarding information base (LFIB) based on the incoming label and interface.
PHP: The P router removes the top label from the packet at the penultimate hop before reaching the egress PE router. This is done to avoid an extra lookup on the egress PE router, which can forward the packet based on its IP header or another label in the stack.
A P router does not perform push or drop actions on labels. A push action means adding one or more labels to the packet, which is done by an ingress PE router when initiating an LSP. A drop action means discarding a packet, which is done by any router when there is no matching entry in its LFIB or routing table. References: Provider (P) Router in IP MPLS Network - Cisco Community, MPLS Fundamentals: Forwarding Labeled Packets - Cisco Press, MPLS Label Switching | MPLS Operation | Push, Swap,Push IPCisco
NEW QUESTION # 29
How many different priorities are available to use in a VLAN header?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
Explanation
There are 8 different priorities available to use in a VLAN header. A VLAN header is a 4-byte field that is inserted into an Ethernet frame to indicate the VLAN membership and priority of the frame. The VLAN header consists of two subfields: the tag protocol identifier (TPID) and the tag control information (TCI). The TCI subfield contains three subfields: the priority code point (PCP), the drop eligible indicator (DEI), and the VLAN identifier (VID). The PCP subfield is a 3-bit field that specifies the priority level of the frame, ranging from 0 (lowest) to 7 (highest). The PCP values can be used to implement quality of service (QoS) mechanisms on bridges and switches12.
References: HTML rt Tag - W3Schools, VLAN 0 Priority Tagging Support - Cisco
NEW QUESTION # 30
In a company network, a host sends an Ethernet frame destined to the address FF:FF:FF:FF:FF:FF.
What will an Ethernet switch do with this frame?
- A. It will forward the frame to only one port.
- B. It will forward the frame to all ports.
- C. It will send the frame only to management port.
- D. It will drop it.
Answer: B
Explanation:
Explanation
An Ethernet switch will forward the frame to all ports when the destination address is FF:FF:FF:FF:FF:FF.
This is because this address is the broadcast MAC address, which means that the frame is intended for all devices on the same LAN segment. The switch does not need to look up its MAC address table to find a matching entry for this address, but simply floods the frame out of all ports except the one where it received the frame. This way, the frame reaches every device on the LAN segment, regardless of their MAC addresses. References: Ethernet - Wireshark, Broadcast MAC Address - omnisecu.com
NEW QUESTION # 31
What is the subnet address for 10.57.126.156/29?
- A. 10.57.126.152
- B. 10.57.126.156
- C. 10.57.126.144
- D. 10.57.126.0
Answer: A
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 # 32
Which action will influence BGP route selection within your AS?
- A. changing the default value of the local preference
- B. reducing number of hops in the network
- C. changing the default link metric
- D. changing the administrative distance for eBGP
Answer: A
Explanation:
Explanation
The action that will influence BGP route selection within your AS is changing the default value of the local preference attribute. The local preference attribute is used to indicate the preference of a path among multiple paths learned from different external BGP neighbors or autonomous systems (ASes). The higher the local preference value, the more preferred the path is within your AS, and vice versa. The default value of local preference is 100, but you can change it using route maps or other configuration methods on your BGP routers. References: Ericsson IP Networking - Routing Protocols, BGP Attributes and Path Selection, BGP Local Preference Attribute: Controlling Traffic Like a Pro
NEW QUESTION # 33
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 # 34
Regarding the BGP decision algorithm, which two statements are correct? (Choose two.)
- A. A higher local-preference attribute will be favored over a lower local-preference attribute.
- B. The most important criteria is the administrative distance.
- C. A path cannot be considered if the next-hop is inaccessible.
- D. A lower local-preference attribute will be favored over a higher local-preference attribute.
Answer: A,C
Explanation:
Explanation
Regarding the BGP decision algorithm, two statements that are correct are:
A higher local-preference attribute will be favored over a lower local-preference attribute. The local-preference attribute is used by BGP routers within an AS to indicate their preference for an exit point from the AS. A higher value means a more preferred path. The local-preference attribute is exchanged only between iBGP peers and does not leave the AS boundary89.
A path cannot be considered if the next-hop is inaccessible. The next-hop attribute is used by BGP routers to determine where to forward packets for a given destination prefix. The next-hop attribute is usually set to the IP address of the eBGP neighbor that advertises the prefix. If there is no IGP route to reach the next-hop address, the path is marked as invalid and ignored by BGP1011.
The other two statements are incorrect because:
The most important criteria is not the administrative distance, but rather the weight attribute. The administrative distance is used by routers to choose between routes from different routing protocols, not within BGP. The weight attribute is a Cisco-specific attribute that is used by BGP routers to prefer one path over another within the same router. The weight attribute is local to the router and not advertised to any peers1213.
A lower local-preference attribute will not be favored over a higher local-preference attribute, as explained above.
References: BGP Best Path Selection Algorithm - Cisco, Understanding BGP Local Preference Attribute - NetworkLessons.com, BGP Next Hop Attribute Explained - NetworkLessons.com, BGP Next Hop Processing
- Cisco Press, BGP Weight Attribute Explained - NetworkLessons.com, Understanding BGP Weight Attribute
- Cisco Community
NEW QUESTION # 35
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