User`s guide

Appendix A Glossary of Network Terms and Internet Protocols
Internet Protocol Definitions
80 LanScaperPRO Network Tester User’s Guide
Internet Protocol Definitions
ARP (Address Resolution Protocol)
Used to determine Ethernet (MAC) address when a
device starts to communicate with another. The IP
address is known and a broadcast is used to request the
specific IP addressed device to respond with its MAC
address so further communication can be specifically
addressed between the two.
DHCP (Dynamic Host Configuration Protocol)
Used when a new IP device is added to a LAN and it
needs to get information about the IP addresses used on
that LAN. One DHCP server must be present on the LAN
to provide a response to a DHCP request transmitted to a
broadcast address and inform the new device of several
configuration details. A DHCP server is not required on a
LAN, but if it does not exist, all the devices on the LAN
must be manually configured. Much information can be
provided by the DHCP server, the LanScaperPRO
requests and uses:
– an IP address for itself (My IP)
– the IP address of the DHCP server on the LAN
– the Netmask in use
– the IP address of the Router on the LAN
– the IP address of the DNS server accessible from the
LAN
LanScaperPRO_User_Guide.book Page 80 Friday, January 25, 2008 1:14 PM