Which of the following elements together uniquely identify a LSA? (Choose three.)
A. LS type
B. Link state ID
C. Advertising Router
D. LS Sequence number
The address space 172.28.100.0/24 is currently used. If the subnet mask 172.28.100.0/30 is used to divide this address space into several subnets serving WAN links, how many subnets in total can the address space be divided into?
A. 30
B. 64
C. 126
D. 254
An OSPF neighbor relationship fails to be established and the display ospf error command output is as follows.
Which of the following is the possible cause?
A. Router IDs conflict.
B. Area IDs are mismatched.
C. Network masks are inconsistent.
D. Authentication types are inconsistent.
OSPF supports two authentication modes: area authentication and interface authentication. The two authentication modes cannot be configured at the same time.
A. True
B. False
A Router ID is optional in the OSPF configuration.
A. True
B. False
Which statement about OSPF is false?
A. The router with a higher Router Priority also has a higher DR election priority.
B. When two routers have the same Router Priorities, the router with a larger Router ID has a higher DR election priority.
C. If a DR fails, the BDR automatically takes over as the DR and a new BDR is elected.
D. If a BDR fails, the DR will not take over as the BDR and awaits the fault recovery of the BDR. No new BDR will be elected.
The network 154.27.0.0 without any subnet can support() hosts?
A. 254
B. 1024
C. 65,534
D. 16,777,206
Which of the following statements about a neighbor state machine is true?
A. The Attempt state appears only on an NBMA network or a broadcast network.
B. The Attempt state appears only on an NBMA network or a P2MP network.
C. LSR packets can be sent in the Exchange state.
D. The Full state indicates that LSDB synchronization is complete. No LSDB information will be exchanged.
Which of the following IP addresses are network addresses? (Choose two.)
A. 64.104.3.7/28
B. 192.168.12.64/26
C. 192.135.12.191/26
D. 198.18.12.16/28
Assume that the VRID of a VRRP virtual router is 100 and the virtual IP address of the virtual router is 192.168.1.1, which of the following addresses is the virtual MAC address of the virtual router?
A. 00-00-5E-00-01-64
B. 00-00-5E-00-01-01
C. 01-00-5E-00-01-64
D. 01-00-5E-00-01-01
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