Http on the workstation is down.-web browsers use http to access web sites. if http is down or port 80, which is used for http traffic, is blocked, you wont be able to access the intranet web site.incorrect answers:b: dhcp is responsible for automating the assignment of ip configurations to computer systems on a tcp/ip network. if dhcp was down, we would not be able to access the server at all.c: dns is used to provide host name to ip address translation. if we can ping to the host name then there can be no problem with dns.d: the ping command is used to test connectivity to a remote host. if the web server is down, ping will not be successful.references:david groth and toby skandier, network+ study guide (4th edition), sybex, alamedaca, 2005, pp. 117, 136-144, 184.