User manual

Cobalt CacheRaQ 4 User Manual 93
Logical memory
See virtual memory.
Media access control (MAC) sublayer
The lower of the two sublayers of the data link layer dened by the IEEE.
The MAC sublayer handles access to shared media, such as whether token
passing or contention is used.
Media access control (MAC) address
A standardized data-link-layer address that is required for every port or
device that connects to a LAN. Other devices in the network use these
addresses to locate specic ports in the network, and to create and update
routing tables and data structures. MAC addresses are six bytes long and are
controlled by the IEEE. Also known as a hardware address, a MAC-layer
address and a physical address.
When your computer is connected to the Internet, a correspondence table
relates your IP address to your computer's physical (MAC) address on the
network
Name server
A program that constitutes the server half of the DNS client-server
mechanism. A name server contains information about a segment of the
DNS database and makes it available to a client called a resolver. A resolver
is often just a library routine that creates queries and sends them across a
network to a name server.
NAT
See Network Address Translation (NAT).
Netmask
See subnet mask.
Network Address Translation (NAT)
A mechanism for reducing the need for globally unique IP addresses. NAT
allows an organization with addresses that are not globally unique to connect
to the Internet by translating those addresses into globally routable address
space. Also known as Network Address Translator.