Network maintenance can be divided into two categories: daily maintenance and troubleshooting.
If the maintenance personnel have a high level of technical skills, they can maintain the network based on experience without following operating specifications.

The file information shown in the figure exists on the R2 device. When the network engineer uses the "dir | exclude 1" command to view the file information, which of the following files will be seen?

In the IS-IS IPv6 network shown in the figure, all routers have multi-topology enabled. Configure
"ipv6 default-route-advertise always level-1" in the R4 IS-IS process.

By default, which of the following routers has no default route in its routing table?

MPLS supports carrying multiple network protocol services, including unicast IPv4 services, multicast IPv4 services, unicast IPv6 services, multicast IPv6 services, etc.

R4's Router ID is 10.0.4.4. In R4's LSDB, the LSA shown in the figure is seen. The network engineer makes the following inferences based on the LSA. Which of them are correct? (Multiple choice)