11N Broadband Wireless Router
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protocols. It provides an authentication mechanism to devices wishing to attach
to a LAN or WLAN.IEEE 802.1X defines the encapsulation of EAP over LAN
or EAPOL. 802.1X authentication involves three parties: a supplicant, an
authenticator, and an authentication server. The supplicant is a client device
(such as a laptop) that wishes to attach to the LAN/WLAN - though the term
'supplicant' is also used interchangeably to refer to the software running on the
client that provides credentials to the authenticator. The authenticator is a
network device, such as an Ethernet switch or wireless access point; and the
authentication server is typically a host running software supporting the
RADIUS and EAP protocols. The authenticator acts like a security guard to a
protected network. The supplicant (i.e. client device) is not allowed access
through the authenticator to the protected side of the network until the
supplicant’s identity has been validated and authorized. With 802.1X port-based
authentication, the supplicant provides credentials, such as user name / password
or digital certificate, to the authenticator, and the authenticator forwards the
credentials to the authentication server for verification. If the authentication
server determines the credentials are valid, the supplicant (client device) is
allowed to access resources located on the protected side of the network.
PPPOE
The Point-to-Point Protocol over Ethernet (PPPoE) is a network protocol for
encapsulating PPP frames inside Ethernet frames. Integrated PPP protocol
implements authentication, encryption, and compression functions that
traditional Ethernet cannot provide and can also be used in the cable modem and
digital subscriber line (DSL) and Ethernet that provide access service to the
users. Essentially, it is a protocol that allows to establish a point-to-point tunnel
between two Ethernet interfaces within an Ethernet broadcast domain.
DNS
The Domain Name System (DNS) is a hierarchical distributed naming system
for computers, services, or any resource connected to the Internet or a private
network. It associates various information with domain names assigned to each
of the participating entities. A Domain Name Service resolves queries for these
names into IP addresses for the purpose of locating computer services and
devices worldwide. An often-used analogy to explain the Domain Name System
is that it serves as the phone book for the Internet by translating human-friendly
