Руководство Пользователя для Netopia 2e-h-w
Cayman 2E-H-W User’s Guide
How Your Cayman 2E-H-W Works
November 2000
C-5
About PPP
The Point-to-Point Protocol (PPP) is a set of network protocols that
enables you to connect TCP/IP hosts and networks over a serial
telephone connection (applicable to older versions of the Cayman
2E-H-W) or an Ethernet (xDSL or cable modem) connection.
Extensions to the PPP protocol suite enable a PPP link to support
other network protocols, including IPX, AppleTalk, and DECnet. The
nodes at each end of a PPP link are referred to as peers. Unlike
client-server networks, where one device is responsible for
providing services to another, peer-to-peer networks function as
equals, providing services to one another as needed.
enables you to connect TCP/IP hosts and networks over a serial
telephone connection (applicable to older versions of the Cayman
2E-H-W) or an Ethernet (xDSL or cable modem) connection.
Extensions to the PPP protocol suite enable a PPP link to support
other network protocols, including IPX, AppleTalk, and DECnet. The
nodes at each end of a PPP link are referred to as peers. Unlike
client-server networks, where one device is responsible for
providing services to another, peer-to-peer networks function as
equals, providing services to one another as needed.
How PPP Works
PPP provides a standard method of encapsulating network protocol
information over point-to-point links. PPP also defines a Link Control
Protocol (LCP), which provides for link configuration, peer
authentication, and link quality monitoring. Finally, PPP includes
several Network Control Protocols (NCPs), which establish how
datagrams for a specific higher-level protocol using PPP as a data link
should be encapsulated. Network control protocols establish and
configure different network-layer protocols, such as TCP/IP. PPP
encapsulation provides for transmission of different network-layer
protocols simultaneously over the same link.
information over point-to-point links. PPP also defines a Link Control
Protocol (LCP), which provides for link configuration, peer
authentication, and link quality monitoring. Finally, PPP includes
several Network Control Protocols (NCPs), which establish how
datagrams for a specific higher-level protocol using PPP as a data link
should be encapsulated. Network control protocols establish and
configure different network-layer protocols, such as TCP/IP. PPP
encapsulation provides for transmission of different network-layer
protocols simultaneously over the same link.
Phases of a PPP
Link
Link
When one PPP peer opens a link to another peer, the PPP link moves
through several phases:
through several phases:
Link establishment
Link configuration
Authentication
Network configuration
Link up
Link termination