An enterprise administrator wants to configure single-hop BFD to implement fast detection of direct links. Which of the following configurations are mandatory?
In an IPv4 address space, Class D addresses are used for multicast. Among Class D addresses, which of the following is the permanent group address range reserved for routing protocols?
There are two types of routing entries on a PIM network. (S, G) routing entries are used to set up on a PIM network and are applicable to both PIM-DM and PIM-SM networks.
When an SSH client accesses an SSH server for the first time and the SSH server's public key is not configured on the SSH client, you can enable first-time authentication on the SSH client. This allows the SSH client to access the SSH server and saves the SSH server's public key on the SSH client. In this way, the next time the SSH client accesses the SSH server, the SSH client can use the saved public key to authenticate the SSH server.