Computer communication Networks

Teacher Time Table: Link Summer Course Link: Link

Book: Link Sheet : Link

Lecture 1

• My Introduction and policies

• What is Networks

• What is internet

• Wired and wireless technologies for communication

• Component of networks

  • End devices, communication links and packet switches

• Data and packets

• What is protocols

• An Analogy for networks using factory

Youtube Links: Link 1 Link 2

Lecture 2

• Revision of previous lectures

• Protocols examples

• internet standards

• Services provided by networks (specifically TCP/UDP Reliable/Unreliable)

• Network API

• Client server and Peer to peer model

• Network Structure

  • Edge and Core

  • Access Network

• What is bandwidth? Lecture 1 & 2

Youtube Link: Link 1 Link 2

Lecture 3

• 5 Layers of Network

• Protocol at each level

• network Architecture (P2P, Client and Server)

• Encapsulation

• Introduction to Sockets Lecture 3

Youtube Link: Link 1 Link 2

Lecture 4

• More Detail about socket (Well known and dynamic ports)

• Purpose of port#

• Access Network

  • Home Access Network

    • DSL,FTTH, Cable network, Enterprise level

    • What is Multiplexing (TDM,FDM, random access)

• Wireless access Network

• Physical Medium

  • Guided and Unguided Lecture 4

Youtube Link: Link 1 Link 2

Lecture 5

• CP 1: Data rate and Bandwidth

• Circuit Switching

  • TDM and FDM

  • Pros and Cons

• Packet Switching

  • Packet loss

  • delay

• TDM related problems

  • Frame rate

  • Data rate of TDM line and single slot

  • Frame and slot

Youtube Link: Link 1 Link 2 Link 3 Lecture 5

Assignment 1 + Solution (Link 1 Link 2)

Lecture 6

• Continuation of Lecture 5

  • Statically multiplexing

  • Comparison of Statically and Time division multiplexing

• Types of delays

• Trace route command

• Bottleneck link

• Throughput Lecture 6

Youtube Link: Link 1 Link 2 CP 1 solution Quiz 1 Solution

Lecture 7

• Delay related problem

• Introduction to application layer

  • Type of services required

  • Example of application with service requirement

  • TCP and UDP

  • Example of application layer protocol with transport layer protocol

Youtube Link: Link 1 Link 2 Link 3 Lecture 7

Lecture 8

• Socket programming

• TCP Iterative and concurrent

• Discussion of basic commands Lecture 8

Youtube Link: Link 1

Lecture 9

• Introduction to Http

• Persistent and non persistent connections and their difference

• Request and response message formats and discussion

• Cookies

• Web cache (Proxy Server)

• Activities on Http Lecture 9

Youtube Link: Link 1 Link 2 Link 3 Link 4

Lecture 10

• DNS

• Services provided by DNS

• DNS hirerical Structure

• Resource Record types

• Activities for practice Lecture 10

Youtube Link: Link 1 Link 2

Lecture 11

• DNS activity in detail discussion

• Introduction to Transport Layer

  • Service provided by transport layer

  • connection less and connection oriented demultiplexing

  • TCP and UDP

Youtube Link: Link 1 Link 2 Lecture 11

Assignment 2 + solution

Lecture 12-13

• UDP Packet structure

• Checksum Calculations

• Principle of reliability

  • ACk/NACK packets

  • Sequence #, Ack and Timer(stop and wait protocol)

  • Channel Utilization for Stop and wait protocol

  • Introducing Pipeline Protocol

• Go back N protocol

• Selective repeat

• Comparision of GO back N and selective repeat

• some real problem

Lecture 12-13

Youtube Link: Link 1 Link 2

Youtube Link: Link 1 Link 2

Lecture 14

• TCP segment structure

  • Purpose of each filed in TCP header

  • Flags

Youtube Link: Link 1 Lecture 14

Lecture 15

• Why TCP has length filed of 4 bits? Answer: click here

• Connection management in TCP

  • How TCP establishes connection - 3 way?

  • Closing down of TCP connection

  • Sequence number and ack number

• How to set timout for timer?

Youtube Link: Link 1 Link 2 Lecture 15 + Quiz 3 solution

Lecture 16

• Revision

Youtube Link: Link1 Activity

Lecture 17

• Revision

Youtube Link: Link1 Activity

Mid Term

Solution Section L (Question type Long - Short - MCQ) - Click here

Solution Section C&N (Question type Long - Short - MCQ) - Click here

Lecture 18

• Timer Calculation for TCP

  • Estimated RTT, Sample RTT, DEv RTT

  • Example with solution

• Retransmission scenario in TCP.

Youtube Link: Link 1 Link 2 Link 3

Lecture 19

• Retransmission scenario in TCP.

• double timeout interval in TCP

• TCP ack events and receiver action

• TCP fast retransmission

  • 3 duplicate ack and timeout

  • Which one is more dangerous

• TCP Flow control

Youtube Link: Link 1 Link 2 Link 3 Lecture 19

Lecture 20

• Congestion Control (CC)

  • Types of CC

  • Mechanism of congestion control (Slow Start, Congestion avoidance)

  • Fast recovery (TCP Reno and TCP Tahoe)

  • TCP Throughput

• Fairness in TCP

Youtube Link: Link 1 Link 2 Link 3 Lecture 20

Lecture 21

• Introduction to Network Layer

  • Forwarding and Routing

  • Connection oriented and connection less

    • Datagram and Virtual Circuit

• Datagram Network

• Longest Prefix Matching

• Inside Router

Youtube Link: Link 1 Link 2 Link 3

Lecture 22

• IPv4 datagram format

• IP fragmentation

Youtube Link: Link 1 Link 2 Lecture 21-22 Assignment 3 + Assignment 3 solution

Lecture 23-24

• Subnetting

  • What is IP Address

  • How to find number of sub networks

  • Host and network portion meaning in IP

  • Classfull IP address

  • Classless IP address

    • two examples

• Subnet mask Purpose

• DHCP

• NAT Lecture 23-24

Quiz 4

Lecture 25-26

• Routing Algorithm

  • Dijestra

  • Belmen fold equation Lecture 25-26

Assignment 4 + Quiz 5

Lecture 27-28

• Introduction to data link layer

• type of services it provide

• MAC layer

• ARP Protocol

• How MAC and IP address works

• Real scenario of whole CCN Lecture 27-28

Lecture 29-30

• Revision

Assignment 4 solution

Quiz 5 + Quiz 6