单选题A network administrator of a company has many branch locations each using a subnet mask of 255.255.255.224. Which of the following dynamic routing protocols should be used？（）A IPv6B RIPC IGRPD RIPv2

You work as network consultant. Your customer, TestKing Inc, has a class C network license. TestKing wants you to subnet the network to provide a separate subnet for each of its 5 departments. Each subnet must support at least 24 hosts.Which network mask should you use?（）

A.255.255.255.192

B.255.255.255.224

C.255.255.255.240

D.255.255.255.248

E.255.255.255.252

F.255.255.255.254

A.RIP v1

B.RIP v2

C.IGRP

D.OSPF

E.BGP

F.EIGRP

A. The ip classless command is enabled by default in recent versions of IOS.

B. The ip classless command should only be enabled when static routing is being used instead of a routing protocol.

C. The ip classless command should be enabled by the network administrator whenever RIPv1 or IGRP is being used.

D. The ip classless command should be enabled by the network administrator whenever OSPF, RIPv2, or EIGRP is being used.

You are the network administrator at TestKing. TestKing has been assigned the class C IP address 189.66.1.0 by its Internet Service Provider. If you divide the network range by using the 255.255.255.224 subnet mask, how many hosts can be supported on each network?（）

A.14

B.16

C.30

D.32

E.62

F.64

A. RIPv1

B. EIGRP

C. OSPF

D. IGRP

E. RIPv2