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NO.18 Which description is correct about the characteristics of a high-availability network? (Multiple choice)

NO.19 A router runs OSPF, and the output information is shown in the figure. Which of the following statements is correct?

NO.20 In an MPLS domain, LSR can be divided into Ingress LSR, Transit LSR and Egress LSR according to the different processing methods of LSR for data. For the same FEC, a certain LSR can be the Ingress LSR of the FEC or the FEC Transit LSR.

NO.21 IS-IS is a link-state routing protocol that uses the SPF algorithm for route calculation. A campus deploys both IPv4 and IPv6 and runs IS-IS to achieve network interconnection.
As shown in the figure, the IPV4 and IPv6 costs of this network are the same, and R1 and R4 only support IPV4. By default, in the IPv6 shortest path tree formed by calculation, the next hop device for R2 to access R6 is: ( ). (Note: the device name must be the same as the figure, such as: R1)

NO.22 In the intra-domain MPLS VPN network, when the data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Which of the following description about the two layers of labels is wrong? (Multiple choice)

NO.23 In what ways can log information be viewed? (Multiple choice)

NO.24 OSPFV2 is an IGP running on an IPV4 network; OSPFv3 is an IGP running on an IPV6 network. The basic working mechanism of OSPFv3 is the same as that of OSPFv2, such as the election of DR and BDR.
As shown in the figure, an engineer uses three routers to test IPv6 services. He wants to realize the interconnection of IPv6 networks by running OSPFv3.

Which of the following statements about the election of the network DR is correct?

NO.25 The IS-IS neighbor relationship between R3 and R1 is not established. According to the information in this figure, what is the possible reason?

NO.26 In the NFV architecture, what are the specific underlying physical devices? (Multiple choice)

NO.27 Which of the following Community attributes can ensure that the propagation scope of BGP routing entries is only within the AS? (Multiple choice)

NO.28 Regarding the BGP MPLS IP VPN network architecture, which of the following descriptions is wrong?

NO.29 In the test phase of the cutover, the criteria for indicating that the test has been completed are:

NO.30 DHCP Relay is also known as DHCP relay. If DHCP Relay needs to be configured, which of the following steps need to be included? (Multiple choice)

NO.31 As shown in the figure, OSPF is enabled on all interfaces of the router. The ip address marked in the figure is the IP address of the loopback0 interface. The Loopback0 of R1, R2, and R3 is advertised in area 1, and the Loopback0 of R4 is advertised in area 0, Loopback0 of R5 announces which of the following functional addresses in area 2 can ping each other?

NO.32 As shown in the figure, the router runs OSPF, and Area 2 is a completely stubby area. Please match the LSA type and area ID contained in each area.

NO.33 In the process of establishing an LDP session, the active party will first send Initialization information to negotiate parameters. If the passive party does not accept the negotiated parameters, it will send:

NO.34 Routing protocols can detect failures through Hello packets, so BFD is not required.

NO.35 To speed up the detection of link failures in IS-IS networks, you can associate IS-IS with BFD.

NO.36 VRRP packets do not support authentication.

NO.37 After reset isis all is executed, the IS-IS protocol process needs to be restarted, the neighbors need to be re-established, and various IS-IS statistics will not be cleared.

NO.38 Which of the following actions may affect the normal operation of the customer’s network? (Multiple choice)