Suneel Kumar Kothari - CCN Fall2019

Computer Communication and Networks

Lecture 1

What is Internet
- What is Network
"Nuts and Bolts " View
- Computing devices with examples
- Communication link and its type
- Packet switches and their need?
Internet application
What is Protocol, an human analogy for protocol
Internet standards and RFC.
Network Analogy with an real example of road, trucks and factories

Lecture 2

What is infrastructure
Service View
- Application, Distributed application and type of service(reliable and unreliable)
- Network APIs
- Purpose of Network Protocol
Network Structure
- Edge: End system, client to server model, Peer to Peer model
- Core
Access network
- Home Access Network:(DSL, Cable, FTTH, PON and Dial up)
- Enterprise Network
Wireless Access Network

Lecture 3

Physical Media
- Wired(Fiber, Coaxial and twisted pair)
- Wireless
- LAN, Wifi, LTE(3G/4G)
PAN,LAN, MAN,WAN
Frequency and time division multiplexing
Circuit Switching and Packet Switching

Lecture 4

Circuit Switching and Packet Switching
- Pros and Cons
- Examples
Numerical on TDM line data rate and slot data rates
Store and Fwd in packet Switching
Routing and Forwarding tables
Queue and Packet loss

Lecture 3&4 Quiz 1

Lecture 5

Discussion of Quiz 1
What is Gateway
Delay calculation in Store and Forward , in one hop
OSI layers and their need
Parameter to measure network's performance
- Delay, and Throughput
- Four Sources of Delay (Nodel, Queue, TX and Propagation)
- Analogy with CRVAN of Cars
- Throughput

Lecture 6

Statistical Multiplexing
End to end delay
Application Layer and examples of network application
- Architecture (C2S, P2P)
- Socket
- Transport services needed by application
- TCP and UDP

Lecture 7

Assignment 1 Solution
Quiz 2 related to Assignment 1
Revision of UDP and TCP iterative server

Quiz 2(related to Assignment 1)

Lecture 8

HTTP overview
- Persistent and non persistent
- Message exchange among server and client
- example on persistent and non persistent
- Http request and response message format
- Class Activity

Lecture 8 Assignment 2

Lecture 9

HTTP Protocol revision
- comparison between persistent and non persistent
Cookies and complete working
Web cache and conditional GET
Class activity

Lecture 10

File Transfer protocol(FTP)
SMTP, POP3, IMAP
Web based email

Lecture 11

Introduction to DNS(Domain name system)
Different type of DNS services
DNS Distributed Database
Detail of Root TLD and authoritative server
Recursive and iterative DNS query
DNS record types
Example of DNS query and its responses

Lecture 11 Quiz 3 (assignment 2)

Activity on DNS

Lecture 12

Introduction to Transport layer
TCP and UDP explanation
Multiplexing and de multiplexing
Structure of UDP segment
UDP check sum

Lecture 13

UDP Check sum Revision
Principle of Reliable transfer
Purpose of ACK and NACK
Stop and Wait operation
Pipe Lined Protocol
- GBN
- SR

Lecture 14

Review of Stop and Wait operation
Calculation of channel utilization and Pipeline Protocol
Revision of SR and GBN
Introduction to TCP
TCP segment structure (just Introduction)

Lecture 14 Assignment 3

Lecture 15

TCP Segment Structure
TCP Connection Management
TCP Seq/ACK numbers
TCP round trip time and time out
timer calculation and problem solving

Lecture 16

Revision of all Concepts

Lecture 17

Mid Term Paper Review and solution Discussion

Lecture 18

Revision of How reliability achieved in TCP
Different TCP re transmission scenarios
Flow Control In TCP

Lecture 19

Congestion control
- Types of congestion (end to end, Network assisted)
- 3 phases of congestion control
TCP Congestion control
- TCP Thorughput and Fairness in TCP

Lecture 20

Introduction to Network Layers
- Forwarding and Routing
Network Service model (Best Effort, ABR, CBR)
Virtual-Circuit Network
Datagram Network
- Datagram forwarding table
- Longest prefix matching
- Datagram or VC network

Lecture 20 Assignment 4

Lecture 21

What is Router
Router Architecture
- Input port
- Output Port
- Switching Fabric
- Routing Processor
IP datagram format

Lecture 21 Quiz 5 -V1

Lecture 22 -24

IP Address and its structure
Different Classes of IP address(A,B,C,D,E) and its ranges
IP address and interfaces
What is Subnet- Example of subnet with IP address
How to determine subnet
Classless and classfull IP address Discussion
DHCP: Dynamic Host Configuration Protocol
Example of DHCP
NAT: network address translation
From Lecture 21 : Ip Fragmentation

Lecture 22-24(Updated) Assignment 5 (Final)

Lecture 25

Subnet Example
Fragmentation Example
IPV6 header format
IPv6 and IPv4 comparison

Lecture 26

Introduction to Routing Algorithms
Need of Routing Algorithm
What is meaning of Cost of Link
Categories of Routing algo
- Global Routing Algo and decentralized routing Algo
- Static Vs Dynamic
- Load sensitive and load insensitive
Link State Routing Algo
- Dijkstra's Algo- complete discussion

Lecture 27

Dijkstra Algo another example
What is Distance Vector Protocol
- BellmanFord equation
- Working of DV
Difference Between DV and LS

Lecture 28

Introduction to data link layer
Link layer frames
Link layer services
Where is link layer implemented
Multiple access links, protocols
- Point to Point
- Broadcast
MAC Address
Address resolution protocol (ARP)
A day in the life example of a web request

Lecture 28 Quiz 6

Lecture 29-30

Revision

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