Chapter 10: Using for Remote Access
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Objectives
pletion of this chapter, you will be able to perform the following tasks:
Configure an WAN connection
Assign addresses to router interfaces and map higher-level addresses to addresses
Verify configuration in the router
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Chapter Activities
Windows 95 PC
Modem
Branch office
ISDN/analog
Small office
Central site
service
PRI
BRI
BRI
Async
AAA server
Async
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IP
AppleTalk
Novell IPX
Banyan VINES
XNS
ISO-pressed TCP
Bridging
cloud
Virtual
circuit
An Introduction to
LAN protocol
LAN protocol
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OSI Reference Model
Protocol
Application
Presentation
Session
Transport
Network
Data Link
Physical
1
2
3
4
5
6
7
•
•
•
•
LAPB
Physical
1
2
3
Protocol Stack
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DTE—Usually a subscriber's router or PAD
DCE—Usually a PDN's switch or concentrator
Public work (PDN)
DTE
DTE
DCE
DCE
DTE and DCE
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PAD collects data and outputs it into packets
DTE
DTE host
Identifying the PAD
DCE
DCE
PAD
Asynchronous terminals
Public work (PDN)
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work ID code
Network terminal number
4 decimal digits
Up to 10 or 11 decimal digits
() Addressing Format
Addressing set by service provider
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ARP
map
ETH
Destination
MAC
Source
MAC
IP
IP
Source
Destination
Address Resolution
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work
work
IP datagram (L3)
header (L3)
Data-link
frame
(LAPB) (L2)
Encapsulation
Protocol datagrams are reliably carried inside LAPB frames and packets
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