Refer to the exhibit. A network administrator on workstation M uses Telnet to log in to the
command line interface of router A. The administrator wishes to discover information about active
workstations on the LAN attached to router A, including their IP and MAC addresses. Which
command will provide this information?

A.
show hosts

B.
show running-config

C.
show cdp neighbors

D.
show interfaces

E.
show ip arp

Explanation:
ARP establishes correspondences between network addresses (an IP address, for example) and
LAN hardware addresses (Ethernet addresses). A record of each correspondence is kept in a
cache for a predetermined amount of time and then discarded.
Reference:
http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/products_command_reference_chapter
09186a008017d166.html#wp1079902