Glossary

 

 

LDAP is a "lightweight" (smaller amount of code) version of

 

DAP (Directory Access Protocol), which is part of X.500, a

 

standard for directory services in a network.

MAC

Medium Access Control. Internationally unique hardware

 

identification address that is assigned to the NIC (Network

 

Interface Card) which interfaces the node to the LAN.

Masquerading

Where a system acts on behalf of other systems, such as when

 

an ISP server accesses network services on behalf of a dial-up

 

user.

MTU

Short for Maximum Transmission Unit, the largest physical

 

packet size, measured in bytes, that a network can transmit.

 

Any messages larger than the MTU are divided into smaller

 

packets before being sent.

 

Every network has a different MTU, which is set by the

 

network administrator. On Windows, you can set the MTU of

 

your machine. This defines the maximum size of the packets

 

sent from your computer onto the network. Ideally, you want

 

the MTU to be the same as the smallest MTU of all the

 

networks between your machine and a message's final

 

destination. Otherwise, if your messages are larger than one

 

of the intervening MTUs, they will get broken up

 

(fragmented), which slows down transmission speeds.

 

Trial and error is the only sure way of finding the optimal

 

MTU, but there are some guidelines that can help. For

 

example, the MTU of many PPP connections is 576, so if you

 

connect to the Internet via PPP, you might want to set your

 

machine's MTU to 576 too. Most Ethernet networks, on the

 

other hand, have an MTU of 1500.

Network Mask

A 32-bit number used to group IP addresses together or to

 

indicate the range of IP addresses on a single IP network/

 

subnet/supernet. There is a group of addresses assigned to

 

each network segment. For example, the mask 255.255.255.0

 

groups together 254 IP addresses. If we have, as another

146

AlterPath Console Server User Manual

Page 152
Image 152
Cyclades ACS48, 2.3.0 user manual Mac, Masquerading, Mtu, Network Mask