User`s manual

- 26 -
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 realtime 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.
PPTP
Point-to-Point Tunneling Protocol uses TCP to deal data for tunnel maintenance,
and uses PPP for sum up the information carried within the tunnel. The data
carried within the tunnel can be compressed or encrypted. The encryption method
used is RSA RC4. PPTP can operate when the protocol is supported only on the
client and the server located on the other end that the client is corresponds with.
No support is essential from any of the routers or servers within the network the
two PCs are connecting across.
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.
51
RTS
RTS (Request To Send) is a signal sent from the transmitting station to the
receiving station requesting permission to transmit data.
Server
Servers are typically powerful and fast machines that store programs and data.