When there are multiple redundant links in the IS-IS network, multiple equal-cost routes may appear. For a certain route among the equal-cost routes, the network administrator can adjust its priority through the "nexthop xxxx weight value" command. The smaller the value, the higher the priority.

Reveal Solution Hide Solution

After troubleshooting the problem, the network engineer wrote a troubleshooting report, in which he simplified the actual networking into the network shown in the figure.

R1 and R2 both have OSPF enabled and serve as gateways for PC1 and PC2 respectively. Which of the following descriptions are correct? (Multiple choice)

Reveal Solution Hide Solution

In the network shown in the figure, R1 and R2 cannot establish an EBGP neighbor relationship through the direct connection interface. The network engineer first checked the BGP-related configurations of R1 and R2, and determined that the reason why R1 and R2 cannot establish an EBGP neighbor relationship is that the Keepalive and Hold parameters do not match.

Reveal Solution Hide Solution

As shown in the figure, the network administrator deployed the DHCP Snooping trust function on the switch, where GE0/0/2 is the trusted interface and GE/0/3 is the untrusted interface.

Which of the following descriptions of these two interfaces are correct? (Multiple choice)

Reveal Solution Hide Solution

When traffic accesses the backbone network, VPN isolation is required. At this time, the interface configuration of a PE router is as shown in the figure. If the administrator needs to bind the interface to VPN1 and the interface IP address remains unchanged, which of the following descriptions of the administrator’s operation is correct?

interface GigabitEthernet 0/0/1

ip address 192168.100.2 24

Reveal Solution Hide Solution

The exchange of Hello messages between two LSRs (Label switching Routers) triggers the establishment of an LDP session. The Hello message carries the transport address. The device with the smaller transport address will act as the active party and initiate the establishment of a TCP connection.

Reveal Solution Hide Solution

In the IS-IS IPv6 network shown in the figure, all routers have multi-topology enabled. The IPv6 address of the R4 Loopback0 interface is 2000::4/128. Configure "ipv6 summary 2000::64 level-2" in the R2 and R1 IS-IS processes. Configure "ipv6 import-route isis level-2 into level-1" in the R1, R2, and R3 IS-IS processes.

By default, which of the following routers have a route entry for 2000::/64 in their routing table?

Reveal Solution Hide Solution

In the network shown in the figure, the OSPF protocol is deployed between R2 and R1, and the IS-IS protocol is deployed between R2 and R3. In order for R1 to obtain the route to 10.0.3.3/32, the IS-IS route is introduced into the OSPF route on R2. The FA address in the Type5 LSA generated by R2 is ().

Reveal Solution Hide Solution

The networks of large and medium-sized enterprises can be divided into access layer, aggregation layer and core layer. Network engineers need to formulate cutover plans for any operations performed at any layer that affect the existing network services.

Reveal Solution Hide Solution

In the network shown in the figure, R1, R2, R4, and R5 run IS-IS, and the area number is 49.0001. R3 and R6 run IS-IS, and the area number is 49.0002. Within AS 65000, R1, R3, R4, and R6 all establish IBGP neighbor relationships with R2 and R5, of which R2 and R5 are RRs, and R1, R4, R3, and R6 are clients. IBGP neighbor relationships are all established using the Loopback0 interface. The IP address of the Loopback0 interface of each device is 10.0.X.X/32, and the Router ID is 10.0.X.X, where X is the device number. R1 and R4 introduce the external network 192.168.1.0/24 into BGP through the import method, and R3 and R6 introduce the external network 192.168.2.0/24 into BGP through the import method.

Which of the following descriptions are correct by default? (Multiple choice)

Reveal Solution Hide Solution