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WAN - 03 Point-to-Point Connections - Coggle Diagram
WAN - 03
Point-to-Point Connections
Protocols
HDLC
Bit oriented
By ISO
Layer 2
Flow Control
Error Control
High-level Data Link Control
Frame
Flag
Address
Control
Data
FCS
Flag
Cisco HDLS
Additional field (Protocol)
Multiple Network Protocols
PPP
Enhanced version of HDLC
Byte Oriented
Authentication
PAP
No encryption
Username & Password
CHAP
3-way Exchange
Periodic Challenges
Direct Connection
Support LQM
(Link Quality Management)
Layers
Physical
OSI Physical
Synchronous / Asynchronous
Synchronous
Leased-line
Asynchronous
Dial-up
Wide range of media
Full-duplex
Dedicated or Switched
Data Link
Link Control Protocol
(LCP)
Operation
Link Establishment
Authentication
PAP
CHAP
Compression
Stacker
Predictor
Multilink
Link Maintenance
When operation has been handed over to NCP.
Messages
Testing
Echo-Request
Echo-Reply
Discard-Request
Invalid Frames
Code-Reject
Protocol-Reject
Link Termination
Loss of Carrier
Authentication Failure
Link Quality Failure
Idle Timer
Administrative Closing
Network
Network Control Protocol
(NCP)
Separate NCP for each network protocol
Allow multiple network protocols
Sessions
Network Layer Protocol Configuration (NCP)
Link Termination
Network Layer (NCP)
Link (LCP)
Link Establishment & Configuration Negotiation(LCP)
Link Quality Determination (Optional) (LCP)
Usage
Serial Links
Dialup
ISDN
PPP over Ethernet
Authentication, Accounting & Link management Features
PPPoE
DSL Modem
PPP tunnel over Ethernet Connections
MTU 1492 Byte
(PPPoE header is 8 bytes)