問題1
Which of the following statements are true about the Local_Pref attribute in BGP? (Choose all that apply)
Which of the following statements are true about the Local_Pref attribute in BGP? (Choose all that apply)
正確答案: C,D
說明：（僅 NewDumps 成員可見）
問題2
Which of the following statements is false, based on the following IGMP information on an interface of RTA?
XC
Which of the following statements is false, based on the following IGMP information on an interface of RTA?
XC
正確答案: D
說明：（僅 NewDumps 成員可見）
問題3
Which of the following is used as the destination port for single-hop BFD?
Which of the following is used as the destination port for single-hop BFD?
正確答案: D
說明：（僅 NewDumps 成員可見）
問題4
When receiving a packet that does not match any session table entry, the firewall discards the packet to prevent external attacks and ensure internal information security.
When receiving a packet that does not match any session table entry, the firewall discards the packet to prevent external attacks and ensure internal information security.
正確答案: B
說明：（僅 NewDumps 成員可見）
問題5
When deploying BFD, you need to adjust some parameters so that it can better detect the network status.
Which of the following statements is false about BFD optimization?
When deploying BFD, you need to adjust some parameters so that it can better detect the network status.
Which of the following statements is false about BFD optimization?
正確答案: D
說明：（僅 NewDumps 成員可見）
問題6
In IPv6 , NDP (Neighbor Discovery Protocol) uses multiple types of ICMPv6 packets . Which of the following functions are RS (Router Solicitation) packets used for?
In IPv6 , NDP (Neighbor Discovery Protocol) uses multiple types of ICMPv6 packets . Which of the following functions are RS (Router Solicitation) packets used for?
正確答案: C
說明：（僅 NewDumps 成員可見）
問題7
Match the following IPv4 multicast protocols with the corresponding functions.
Match the following IPv4 multicast protocols with the corresponding functions.
正確答案:
Explanation:
IGMP: Manages IPv4 multicast group members and runs on the multicast network ' s last segment (that is, the network segment where a Layer 3 network device is connected to user hosts).
PIM: Sends multicast data over the network to the multicast device that is connected to group members that have requested the multicast data, implementing multicast data forwarding based on routes.
IGMP Snooping: Manages and controls the forwarding of multicast data packets to effectively suppress the flooding of multicast data packets on the Layer 2 network.
IGMP (Internet Group Management Protocol) :
* IGMP is used by hosts and adjacent multicast routers to establish and maintain multicast group memberships on a local subnet.
* It allows a host to inform a multicast router of its desire to receive multicast traffic for a specific group.
* It operates at Layer 3 and runs on the last segment of the network.
* HCIP-Datacom-Core Technology Training Material (Multicast Fundamentals) .
PIM (Protocol Independent Multicast) :
PIM is a routing protocol designed for efficient routing of IP multicast traffic. It determines the paths over which multicast packets should be forwarded.
PIM is " protocol-independent " because it uses the underlying unicast routing table for RPF (Reverse Path Forwarding) checks.
It is responsible for distributing multicast data throughout the network.
Reference : HCIP-Datacom-Core Technology Training Material (Multicast Routing Protocols) .
IGMP Snooping :
IGMP Snooping operates at Layer 2 and monitors IGMP traffic between hosts and routers.
It prevents multicast flooding by allowing a switch to forward multicast packets only to the ports that have joined specific multicast groups.
This significantly enhances efficiency in Layer 2 networks with multicast traffic.
Reference : HCIP-Datacom-Core Technology Training Material (IGMP Snooping Concepts) .
問題8
Which of the following statements are true about IP multicast service models?
Which of the following statements are true about IP multicast service models?
正確答案: A,B
問題9
Multiple BGP processes cannot be configured on the same router.
Multiple BGP processes cannot be configured on the same router.
正確答案: A
說明：（僅 NewDumps 成員可見）
問題10
On a P2P IS-IS network, after a neighbor relationship is established between R1 and R2, R2 finds that its LSDB is not synchronized. Then, R2 requests corresponding LSPs from R1 for LSDB synchronization. The following figure shows the synchronization process. Drag the following packet types to the steps in which they are used.(Token is reusable)
On a P2P IS-IS network, after a neighbor relationship is established between R1 and R2, R2 finds that its LSDB is not synchronized. Then, R2 requests corresponding LSPs from R1 for LSDB synchronization. The following figure shows the synchronization process. Drag the following packet types to the steps in which they are used.(Token is reusable)
正確答案:
Explanation of IS-IS Packet Types and Synchronization Process:
In the given scenario, R2 requests LSPs from R1 to synchronize its Link State Database (LSDB). The following IS-IS packet types are involved in this synchronization process:
1. P2P IIH (Point-to-Point IS-IS Hello):
* Purpose: Establishes and maintains IS-IS neighbor relationships.
* Step: This packet is exchanged initially to detect and maintain the adjacency between R1 and R2.
2. PSNP (Partial Sequence Number PDU):
* Purpose: Requests missing or outdated LSPs (Link State PDUs) from a neighbor to synchronize the LSDB.
* Step: In this case, R2 sends a PSNP to R1 to request the missing or outdated LSP.
3. LSP (Link State PDU):
* Purpose: Contains routing information and is used to update the LSDB.
* Step: R1 sends the requested LSPs to R2 for synchronization.
4. CSNP (Complete Sequence Number PDU):
* Purpose: Lists all LSPs in the sender ' s LSDB to help neighbors verify and request missing LSPs.
* Step: R1 sends a CSNP during retransmission timeout to notify R2 of its LSPs.
In the given scenario, R2 requests LSPs from R1 to synchronize its Link State Database (LSDB). The following IS-IS packet types are involved in this synchronization process:
1. P2P IIH (Point-to-Point IS-IS Hello):
* Purpose: Establishes and maintains IS-IS neighbor relationships.
* Step: This packet is exchanged initially to detect and maintain the adjacency between R1 and R2.
2. PSNP (Partial Sequence Number PDU):
* Purpose: Requests missing or outdated LSPs (Link State PDUs) from a neighbor to synchronize the LSDB.
* Step: In this case, R2 sends a PSNP to R1 to request the missing or outdated LSP.
3. LSP (Link State PDU):
* Purpose: Contains routing information and is used to update the LSDB.
* Step: R1 sends the requested LSPs to R2 for synchronization.
4. CSNP (Complete Sequence Number PDU):
* Purpose: Lists all LSPs in the sender ' s LSDB to help neighbors verify and request missing LSPs.
* Step: R1 sends a CSNP during retransmission timeout to notify R2 of its LSPs.
問題11
In IPv6, interface IDs can be manually configured, automatically generated by the system, or generated based on the IEEE EUI-64 standard.
In IPv6, interface IDs can be manually configured, automatically generated by the system, or generated based on the IEEE EUI-64 standard.
正確答案: B
說明：（僅 NewDumps 成員可見）
問題12
In an OSPF process of a router, the import-route command can be used to import the routes of other OSPF processes.
In an OSPF process of a router, the import-route command can be used to import the routes of other OSPF processes.
正確答案: B
問題13
Which of the following statements regarding routing policy and policy-based routing are true?
Which of the following statements regarding routing policy and policy-based routing are true?
正確答案: A,B
說明：（僅 NewDumps 成員可見）
問題14
The AS_Path attribute records the numbers of all ASs that a route passes through from the local end to the destination in the vector order. If a BGP speaker advertises a route to an IBGP peer, it creates an empty AS_Path in an Open message. This prevents routing loops between ASs.
The AS_Path attribute records the numbers of all ASs that a route passes through from the local end to the destination in the vector order. If a BGP speaker advertises a route to an IBGP peer, it creates an empty AS_Path in an Open message. This prevents routing loops between ASs.
正確答案: B