单项选择题

Which statement describes the rule of split horizon?（）

A. Only routers can split boundaries (horizons) between concentric networks.
B. All distance vector protocols require fall back routers that may cause momentary loops as the topology changes.
C. Networks can only remain fully converged if all information about routers is sent out all active interfaces.
D. Information about a route should not be sent back in the direction from which the original update come.
E. Each AS must keep routing tables converged to prevent dead routes from being advertised across the AS boundary.

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热门试题

多项选择题A network host is configured as follows: Host IP address: 192.168.16.183 Subnet mask: 255.255.255.224 Default gateway: 192.168.16.190 Which of the following statements describe the network to which this host is attached?（）

A. The default gateway is configured on a different subnet form this host.
B. The host is a member of the fifth usable subnet of the 192.168.16.0 network.
C. The subnetwork address for this host is 192.168.16.160/28.
D. The address of the next higher subnet is 192.168.16.192.
E. The address of the router interface that is attached to this subnetwork is 192.168.16.190.
F. There are 60 usable host addresses on this subnet.

单项选择题What is a global command?（）

A. A command that is available in every release of IOS, regardless of the version or deployment status.
B. A command that can be entered in any configuration mode.
C. A command that is universal in application and supports all protocols.
D. A command that is implemented in all foreign and domestic IOS version.
E. A command that is set once and affects the entire router.

单项选择题What feature of a networks switch allows an administrative to create separate broadcast domains?（）

A. Store-and-forward switching
B. Microsegmentation
C. Transparent bridging
D. Fragment-free switching
E. Virtual LANs
F. Cut-through switching

单项选择题Which of the following options lists the steps in PPP session establishment in the correct order?（）

A. Optional authentication phase, link establishment phase, network layer protocol phase.
B. Network layer protocol phase, link establishment phase, optional authentication phase.
C. Network layer protocol phase, optional authentication phase, link establishment phase.
D. Link establishment phase, network layer protocol phase, optional authentication phase.
E. Link establishment phase, optional authentication phase, network layer protocol phase.
F. Optional authentication phase, network layer protocol phase, link establishment phase.

单项选择题Which Frame Relay feature is responsible for transmitting keepalives to ensure that the PVC does not shut down because of inactivity?（）

A. DLCI
B. BECN
C. FECN
D. LMI
E. CIR
F. DE