Which of the following statements regarding IP address allocation are true? (Multiple Choice)

All IP addresses on a network must be unique except when anycast is used.
IPv4 addresses are classified into Classes A, B, and C.
The mask length of /24 can simplify network design.
Variable length subnet mask (VLSM) is often used for determining mask lengths to improve IP address efficiency.

Answer(s): A,D

Which of the following operations is performed in the risky operation process?

Answer(s): C

Which of the following causes for a VRRP group two-master fault is the most impossible?

The configurations of the devices in the VRRP group are different.
The link where VRRP Advertisement packets are transmitted is faulty.
The VRRP Advertisement packets received by the VRRP backup group with a lower priority are taken as invalid packets and are discarded.
The master device sends a VRRP Advertisement packet every 1 second.

Answer(s): D

Which of the following statements regarding OSPF neighbor relationship faults is false?

The ExStart state indicates that two neighbor routers have inconsistent MTUs or the same OSPF Router ID (RID).
For non-DR and non-BDR routers on an Ethernet link, the 2-Way state is acceptable.
The Init state indicates that the router has received Hello packets from its neighbors but the received Hello packets do not contain the OSPF RID of the receiving router.
The Attempt state indicates that the router does not send unicast Hello packets to configured neighbors.

Answer(s): D

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