COMPUTER
NETWORKS
Lecture-31
Docsity.com
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Guidelines and tips
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
The Future IP - Computer Network - Lecture Slides, Slides of Computer Networks
Future IP, Success of IP, Scaling, Motivation for Change, Address space, Type of service, Multicast, Name and Version Number, Datagram Format, Base Header Format and many other topics of Computer Network can be find in my documents.
Typology: Slides
2011/2012
1 / 16
This page cannot be seen from the preview
Don't miss anything!
Related documents
Partial preview of the text
Download The Future IP - Computer Network - Lecture Slides and more Slides Computer Networks in PDF only on Docsity!
COMPUTER
NETWORKS
Lecture-
Review Lecture 30
IP Datagram Header Format
Datagram Transmission and Frames
Encapsulation
Transmission across an Internet
MTU
Reassembly
Identifying a Datagram
Fragmentation Loss
Fragmenting a Fragment
Introduction - The Future of IP
Current version of IP - Version 4 (IPV4)
- is 20 years old
IPv4 has shown remarkable ability to
move to new technologies
IETF has proposed entirely new version
to address some specific problems
Success of IP IP has accommodated dramatic changes since original design
Basic principles still appropriate today
Many new types of hardware
Scale
Scaling
Size - from a few tens to a few tens of millions of computers
Speed - from 56Kbps to 1Gbps
Increased frame size in hardware
Motivation for Change
Type of service
Different applications have different requirements for delivery reliability and speed
Current IP has type of service that's not often implemented
Multicast
Name and Version Number
Preliminary versions called IP - Next
Generation (IPng)
Several proposals all called IPng
One was selected and uses next
available version number (6)
Result is IP version 6 (IPv6)
IPv6 Datagram Format
IPv6 Base Header Format
Contains less information than IPv4 header
NEXT HEADER points to first extension header
FLOW LABEL used to associate datagrams belonging to a flow or communication between two applications Traffic class Specific path Routers use FLOW LABEL to forward datagrams along prearranged path
IPv6 NEXT HEADER
Parsing IPv6 Headers
Base header is fixed size - 40 octets
NEXT HEADER field in base header defines type of header Appears at end of fixed-size base header
Some extensions headers are variable sized NEXT HEADER field in extension header defines type HEADER LEN field gives size of extension header
Summary
Success of IP
Motivation for Change
IPV6 Features
IPV6 Datagram Format
IPV6 Base Header Format
Parsing IPV6 Headers