Serioux SRX-WR150, Руководство пользователя

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11.NAT (Network Address Translation)
It allows for more than one computer to be in a LAN, sharing an IP address of the public network.
It shields LAN users who access the Internet and it plays an important role in ensuring network
security. It is usually used by broadband routers.
12.NIC (Network Interface Card)
Located in a PC, it provides a physical port to a cable connected to it. If it is an Ethernet NIC,
it usually uses an RJ-45 port.
13.Ping
The ping command sends a message from one computer to another one to check whether it is
reachable and active. It is a tool used to test whether the local computer can interchange information
with another computer on the network. The local computer sends a message to a specified computer
and if that computer receives the message, it responds to the local compu ter.
14.PPP (Point-to-Point Protocol)
It is the link layer communication protocol.
15.RJ-45
It is a standard plug used to connect to an Ethernet switch, a concentrator, and a router. A direct
connecting cable and a crossover cable usually make use of this plug, along with a route
function.
16.TCP/IP (Transmission Control Protocol/Internet Protocol)
It defines a group of protocols.
17.Telnet
It is an interactive program based on characters to enable a client (user on a computer) to log on
to a distant host (another computer) via the Internet. Telnet allows a user a remote login and
setting device.
18.WAN (Wide Area Network)
It is a data communication network covering a large geographic range (like the Internet).
19.Web page
It is a website file on the WWW (World Wide Web). A website may contain hyperlinks (text or images)
to open other web pages. A homepage is the top-level web page of a website.
20.Broadcast
It sends data to all computers in a network.
21.Domain name
It is the unique key component of a URL that identifies a file by its name on the Web. The domain
name is much easier to remember than the corresponding IP address (a series of numbers).
22.Ethernet
It is a network technology used for LANs. A twisted-pair cable is usually used for transmission.
Ethernet data transfer rates (radio frequency signals) between computers are either 10 Mbps or 100
Mbps.
23.Firewall
It can protect a computer or LAN from an unwelcome visit or a malicious attack.
24.Package
It is made up of data and other information, including the source and destination addresses, on a
network.
25.Port
It is physical interface on a computer or router in which a connector is plugged to allow data in or out.
26.Protocol
It is a group of rules used to manage data transmission. Interconnected equipment must follow the
rules to transfer data successfully.
27.Long distance
It is a long way between two points (like a staff member on a business trip logging in to a company
network far away).
28.Route
It is the path taken for data to travel between computer networks. A router forwards the data between
them.