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Glossary
Description
MAC address
（
Media
）
N. Other devices in the
network use these addresses to locate specific ports in the
Access Control address
Standardized data link layer address that is required for every
port or device that connects to a LA
network and to create and update routing tables and data
structures. MAC addresses are 6 bytes long and are controlled
by the IEEE.
M
MTU
（
Maximum
Transmission Unit
）
The size in bytes of the largest packet that can be transmitted.
NAT
（
Network Address
Translator
）
g
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 translatin
those addresses into globally routable address space.
N
rver
NTP Se
NTP Server is used for synchronising the time across computer
networks.
POP3
（
Post Office Protoc
3
）
ol
on.
POP3 is intended to permit a workstation to dynamically access
a maildrop on a server host in a useful fashi
P
PPPoE
（
Point-to-Point
Protocol over Ethernet
）
PPPoE is a network protocol for encapsulating Point-to-Point
Protocol (PPP) frames inside Ethernet frames.
SMTP
（
Simple Mail
Transfer Protocol
）
SMTP is an Internet standard for electronic mail (e-mail)
transmission
SSH
（
Secure Shell
SSH is a network protocol that allows data to be exchanged
Protocol
）
using a secure channel between two networked devices.
S
SA
（
Security Association
）
SA is the establishment of shared security attributes between
two network entities to support secure communication.
