68
Default Gateway
: A routing device used to forward traffic that is not on the local subnet.
When a network device wants to send an IP packet to a destination that is not on the
same network, the device sends the packet to a default gateway, which will send it out
towards the destination. In the case of the BR455GWDC, the router’s IP address acts as a
default gateway.
Denial of Service Attack:
A method used by hackers to prevent legitimate users from
accessing a service or resource. A DoS attack usually involves the hacker sending a large
number of request packets to a targeted network service, making it unusable for other
users.
DHCP
(Dynamic Host Configuration Protocol): A protocol that automatically assigns
dynamic IP addresses to PC/LAN clients logging in to a TCP/IP network. Without
DHCP, IP addresses must be logged in manually at each computer.
DMZ
(DeMilitarized Zone): A computer host or small subnetwork that exists between a
trusted Internal network and an external, untrusted network (such as the Internet). Users
on the external network can access your DMZ without being able to access the rest of
your network.
DNS
(Domain Name System): A system that translates an Internet address (like
www.startech.com) into a proper IP address (like 192.168.2.1). A DNS server keeps a
database of Internet servers and their respective Internet and IP addresses, so that when
you type “www.startech.com” into your web browser, you are sent to the web site
located at 192.168.2.1, for example. Your ISP can provide you with the IP address of the
DNS server you use when connected to the Internet.
DSL Modem
(Digital Subscriber Line Modem): A device that provides a user with
Internet access using telephone lines to connect the computer to the Internet at high
speeds.
Dynamic IP Address:
A temporary IP address given to a PC/LAN client by the DHCP
server for the duration of an Internet session or some other established period of time.
The IP address is chosen at random from a pool of available IP addresses on the DHCP
server. When the session is concluded or the lease-time has expired, the IP address is
returned to the pool.
Encryption
: The transformation of data into encoded ciphertext to ensure data
transmission can not be accessed by users outside the network. Encryption uses an
encryption algorithm and encryption keys to encode and decode the information. See
also WEP.
Encryption Algorithm
: A formula used to convert data from understandable “plaintext”
into encoded “ciphertext.” Each algorithm uses a key (a string of bits) to perform the
calculations. The larger the key (most are 64 or 128-bits in length), the more difficult to
break the code.
ESSID
(Extended Service Set Identifier): The identifying name of an wireless network.
An ESS consists of two or more BSSes in the same subnet. In order to communicate with
each other, each wireless device must have the same ESSID.
Ethernet
: A popular network standard of communication using either twisted pair or
coaxial cables. The most widely used LAN access method, Ethernet networks are
connected by special cables and hubs, and can transfer data at speeds up to 10 or 100
million bits per second (Mbits/sec). Also known as IEEE 802.3.
Содержание BR455GWDC
Страница 76: ...Revised October 22 2003...
