Users suddenly lose connectivity to an existing server. The server technician can ping the
loopback address and the server’s own IP address. However, no other device on the network can
be pinged. The LAN cable is plugged in. Which of the following should the server technician check
next?

A.
hub or switch

B.
DNS server

C.
network link LEDs

D.
subnet mask

E.
router or gateway