What protocol replaces ARP, IGMP, and ICMPv4 on IPv6 based networks??

The element used to create a horizontal line on a web page is:

a. h1 b. br c. hr d. div

A user is unable to open up websites on the Internet from a browser. The administrator determines that the workstation can ping its local gateway, but not the remote web server. At which of the following layers of the OSI model does the problem MOST likely exist?

A. Data link B. Network C. Session D. Physical