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Messages larger than the MTU are divided into smaller packets.
NAT
NAT (Network Address Translation - also known as IP masquerading) enables an organization to present
itself to the Internet with one address. NAT converts the address of each LAN node into one IP address
for the Internet (and vice versa). NAT also provides a certain amount of security by acting as a firewall by
keeping individual IP addresses hidden from the WAN.
(Network) Administrator
The network administrator is the person who manages the LAN within an organization. The
administrator's job includes ensuring network security, keeping software, hardware, and firmware
up-to-date, and keeping track of network activity.
NTP
NTP (Network Time Protocol) is used to synchronize the real-time clock in a computer. Internet primary
and secondary servers synchronize to Coordinated Universal Time (UTC).
Packet
A packet is a portion of data that is transmitted in network communications. Packets are also sometimes
called frames and datagrams. Packets contain not only data, but also the destination IP address.
Ping
Ping (Packet Internet Groper) is a utility used to find out if a particular IP address is present online, and is
usually used by networks for debugging.
Port
Ports are the communications pathways in and out of computers and network devices (routers and
switches). Most PCs have serial and parallel ports, which are external sockets for connecting devices
such as printers, modems, and mice. All network adapters use ports to connect to the LAN. Ports are
typically numbered.
PPPoE
PPPoE (Point-to-Point Protocol Over Ethernet) is used for running PPP protocol (normally used for
dial-up Internet connections) over an Ethernet.
Preamble
Preamble refers to the length of a CRC (Cyclic Redundancy Check) block that monitors communications
between roaming wireless enabled devices and access points.
Protocol
A protocol is a rule that governs the communication of data.
RIP
RIP (Routing Information Protocol) is a routing protocol that is integrated in the TCP/IP protocol. RIP finds
a route that is based on the smallest number of hops between the source of a packet and its destination.
RTS
RTS (Request To Send) is a signal sent from the transmitting station to the receiving station requesting
permission to transmit data.
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