1. Which of the following information can be included in a basic network layer packet? (Multiple choice)

2. Which of the following tools cannot be directly referenced by the If-match clause in the Route-policy?

3. BGP 4+ runs between the two routers. The neighbor relationship is normal. However, the BGP routing table of the local router does not have neighbor's routing entry. What is the possible reason? (Multiple Choice)

4. Which of the following options may affect the establishment of IBGP neighbors? (Multiple Choice)

5. In an MPLS VPN network, different CE devices can exchange routing information with the same PE device using different routing protocols. The routing protocols used between different CE devices and the same device are independent of each other.

6. Which of the following technologies use tunneling technology to communicate between IPv6 addresses? (Multiple Choice)

7. The association between LDP and IGP refers to the suppression of the issuance of reachable routes through IGP. To ensure that the LDP and IGP linkages complete network convergence. Make the IGP and LDP keep the path consistent. Minimize the loss of traffic and improve the reliability of the entire network.

8. Regarding the processing mode of MPLS for TTL, which description is correct?

9. RD is used to distinguish the same IP address in different VPNs. How many bits does the RD contain?

10. The following are the statements about LDP reliability, which one is wrong?

11. The following description of the BSR mechanism, which is correct? (Multiple Choice)

12. If running PIM-SM on a multicast network, you need to construct a multicast forwarding tree between the multicast source and the receiver to enable the receiver to receive multicast data. Which of the following description about the constructed multicast forwarding tree is correct? (Multiple Choice)

13. If there are multiple receivers in a multicast group, the administrator enables IGMP-Snooping on the switch connecting the receiver. After the receiver receives the general query message from the querier, the receiver receives multiple receivers. How to respond?

14. Which of the following options is correct for the assertion mechanism?

15. The following statement about the security confederation SA in IPsec, which is wrong?

16. The LAND attack is performed by the attacker sending a source address and a destination address to the destination host are the destination host, the same SYN packet on source port and the destination port. When the receiver waits for the final ACK packet from the sender, the connection is always in a semi-connected state, resulting in waste of limited TCP resources at the receiving end.

17. Which of the following does the digital certificate not contain?

18. When deploying LLQ, you need to configure bandwidth parameters. What is the meaning of bandwidth parameters?

19. HW users are transmitting a lot of files through TFTP.
What protocol does TFTP rely on for transmission?

20. The following statements about the VRRP protocol which are correct?

21. Which of the following statements about the BFD single-arm echo function are correct? (Multiple Choice)

22. Which of the following types of packets is required to implement virtual machine migration in the BGP EVPN distributed gateway scenario?

23. Which of the following statements about VXLAN messages is correct? (Multiple choice)

24. Which of the following advanced features does BGP EVPN support?

25. As shown in the figure, there are two IPv6 networks that can access the IPv4 network. At the same time, an IPSEC tunnel needs to be established between the two IPv6 networks for communication. Which of the following encapsulation modes can meet the requirements above?