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Last Updated: Aug 18, 2026
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| Section | Objectives |
|---|---|
| IPv6 and Network Security | - Network Security Basics - IPv6 Core Knowledge |
| Wireless and Solutions | - Network Solution Concepts - Large-scale WLAN Architecture |
| Switching and Multicast | - Ethernet Switching Core Knowledge - Multicast Basics |
| Network Reliability and Services | - Network Reliability Basics - Network Service and Management |
| Routing and Traffic Control | - Traffic Control Concepts - OSPF Core Knowledge - Routing Basics - IS-IS Core Knowledge - BGP Core Knowledge |
1. A certain network structure and OSPF partitions are shown in the figure. In the figure, except RTA, RTB, RTC and RTD are all ABR routers.
A) True
B) False
2. In PIM, which of the following descriptions about DR is correct? (Multiple choice)
A) On the shared network segment of the connection group members, the DR is responsible for sending a Register message to the RP. The DR connected to the group members is called the group member-side DR.
B) PIM routers become PIM neighbors by exchanging Hello messages. The Hello messages carry the DR priority and the interface address of the network segment.
C) On the shared network segment connected to the multicast source, the DR is responsible for sending Join registration messages to the RP. The DR connected to the multicast source is called the source DR.
D) If the current DR fails, the PIM neighbor relationship will time out, and a new round of DR election will be triggered between other PIM neighbors.
3. A route-policy can have multiple nodes, different node numbers are identified by seq-number, and the relationship between different seq-number parts is an "or" relationship.
A) FALSE
B) TRUE
4. What are the conditions for volume matching of firewall security policies? (Multiple choice)
A) Message length
B) The source and destination safe area city
C) Source and destination IP addresses
D) Application
5. When the MTU of the interconnection interface of two routers in the broadcast network does not match, and the interface is configured with ospf mtu-enablet, which of the description of the state change of the neighbor relationship between the two routers is correct?
A) The neighbor relationship status of the two devices stays at 2-way
B) The neighbor relationship between the two devices can enter Full
C) The neighbor relationship between the two devices stays at Exstart
D) The neighbor relationship status of the two devices stays in the Init state
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: B,D | Question # 3 Answer: B | Question # 4 Answer: B,C,D | Question # 5 Answer: C |
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