💡
Network Fundamentals
  • About This Site
  • Network
  • Medium
  • Types of Network:
  • LAN
  • MAN
  • WAN
  • Internet
  • Types of Internet Connections
  • Cable Connection
  • DSL Connection
  • Internet Standard & Protocols
  • Internet Networking Model
  • SNA Networking Model
  • OSI Networking Model
  • TCP-IP Networking Model
  • TCP-IP Layers
  • Application Layer
  • HTTP (Hyper Text Transfer Protocol)
  • Transport Layer
  • TCP (Transmission Control Protocol)
  • Network Layer
  • IP (Internet Protocol)
  • IPv4:
  • IPv4 Address parts
  • IPv4 Address Classes
  • IPv6:
  • Data-Link Layer
  • Physical Layer
  • An Ethernet
  • A SOHO LAN Network
  • An Enterprise LAN Network
  • Physical Layer Standards
  • Data-Link Layer Standards
  • Transmitting Data over Ethernet UTP
  • Transmitting Data over Fiber Optic Cable (using Hot-Pluggable Transceivers)
  • Cabling Pinouts (Ethernet UTP)
  • Cabling Pinouts (Fiber Optic)
  • Ethernet Standards (UTP)
  • Ethernet Standards (Fiber Optic)
  • LAN Data-Link Layer Protocols
  • Ethernet Addressing (MAC)
  • Types of Networking Devices
  • HUB
  • SWITCH
  • CSMA/CD (Carrier Sense Multiple Access / Collision Detection):
  • Lease-Line WAN
  • WAN Data-Link Layer Protocols
  • HDLC Encapsulating and Re-encapsulating
  • Ethernet WAN (EoMPLS)
  • IP Routing (BIG FLOW)
  • Router
  • Subnetting
  • Binary Rules
  • Binary Method Example 1
  • Binary Method Example 2
  • Binary Method Example 3
  • Subnetting Quick Method Rules
  • Subnetting Quick Method Example 1
  • Subnetting BEST Method Rules
  • Subnetting BEST Method Example 1
  • Subnetting BEST Method Example 2
  • Subnetting BEST Method Example 3a
  • Subnetting BEST Method Example 3b
  • Subnetting BEST Method Example 3c
  • Subnetting BEST Method Example 4
  • Dynamic Routing Protocol
  • DNS (Domain Name System)
  • ARP (Address Resolution Protocol)
  • PING (Packet Internet Groper)
  • Cisco OS (IOS)
  • Memory Types
  • Cisco CLI
  • Console Port:
  • Telnet Access (Teletype network) (P No. 23):
  • SSH (Secure Shell) (P No. 22)
  • Console Cabling
  • CLI Modes
  • Securing User Mode and Privileged Mode
  • Securing User & Privileged Mode For Console Users
  • Securing User & Privileged Mode For Telnet Users
  • Securing User & Privileged Mode For SSH Users
  • AAA (Authentication, Authorization and Accounting) Server
  • AAA 802.1x Protocols(Radius & TACACS+)
  • Ethernet LAN Switching
  • VLAN
  • Configuring VLAN
  • VTP (Vlan Trunking Protocol)
  • Trunk Port
  • Trunking Protocol (802.1Q)
  • DTP (Dynamic Trunking Protocol)
  • Voice VLAN
  • Why STP?
  • What STP Does?
  • How STP works?
  • STP Messages (BPDU)
  • Electing a RB (Root Bridge/Switch)
  • Electing One Root Port (on each Non RB)
  • Elect One/Multiple Designated Ports on each Non RB:
  • Changing the STP Settings:
  • STP (Spanning Tree Protocol)
  • STP Convergence (if something changes/link fails):
  • STP (Spanning Tree Protocol) Versions
  • STP/RSTP States:
  • PortFast
  • BPDU Guard
  • RSTP (Rapid Spanning Tree)
  • Port Roles in RSTP
  • RSTP Port States
  • Ether Channel
  • Switched Virtual Interface
  • Half Duplex
  • Full Duplex
  • Autonegotiation
  • Duplex Mismatch:
  • Verifying Duplex Mismatch
  • Number History
  • 10 to the power of x
  • 2 to the power of x
Powered by GitBook
On this page

HDLC Encapsulating and Re-encapsulating

PreviousWAN Data-Link Layer ProtocolsNextEthernet WAN (EoMPLS)

Last updated 4 years ago

Suppose LAN1's PC1 is connected to a distanced LAN2's PC2 through a WAN link with a Router in each LAN connecting these two LANs running HDLC in between.

  • Topology is like a BUS Topology where PC1 is connected to a Switch1 then to Router R1. Router R1 is then connected to Router R2 both running HDLC WAN Protocol between each other providing P2P Communication. Router R2 is then connected to Switch2 which is further connected to PC2.

  • PC1 will create an Encapsulated Data with Ethernet Header & Trailer & DIP as PC2's IP but DMAC will be Gateway's MAC which will be R1 Router in this case. Similarly, PC2's Gateway will be a R2 Router.

  • Ethernet Frame (with Ethernet Header+Trailer) will travel from PC1 then at R1 it will be De-encapsulated & Re-encapsulated with HDLC Header & Trailer will travel from R1 to R2 then again De-encapsulated & Re-encapsulated with an Ethernet Header&Trailer then reached to PC2.

Reference:

CCNA 200-301 OCG, Volume 1, Pg. 65 - Wendell Odom.

WAN Data-Link Protocol