Host Addresses

Actual address is "Dotted Quad" example: wp.psi.com ==> 192.33.2.21
nslookup (UNIX) to get dotted quad from name

Hierarchical Network Addressing & Top-Level Domains

Internet's hierarchical domain naming scheme (diagram, 8-bit black and white, GIF87 format, 477 pixels high, 451 pixels wide, 7726 bytes)

R. P. C. Rodgers, Lister Hill Center, NLM (May 1994)