1. CS 381: Introduction to Computer Networks
Exam 1: Study Guide

2. Introduction Overview of the Internet Network edge devices
Network core devices
The five layers of the OSI model
Circuit switched networks
FDM/TDM
Packet switched networks
Store-and-Forward
Sources of delay
History

3. Application Layer Application layer services and protocols
HTTP, , DNS
Application architectures
Client/server
Peer-to-peer (P2P)
Sockets
Web caches (proxy servers)
Video streaming and content distribution networks

4. Transport Layer Transport layer services
Multiplexing/demultiplexing
UDP
Services, advantages, disadvantages, header format
Principles of reliable data transfer
Services and drawbacks of the Internet core
RDT protocols and FSMs
Stop-and-wait protocol
Pipelining
Go-back-N, Selective Repeat
TCP
Generating timeout value
Fast retransmit
Flow control

5. Supplemental Reading
On Distributed Communications: Introduction to Distributed Communication Networks
MEMORANDUM FOR: Members and Affiliates of the Intergalactic Computer Network
Development of the Domain Name System
Congestion Avoidance and Control
Transmission Control Protocol (TCP) RFC 793

6. Exam 1 Format No calculators! Five questions
Covers material from lecture 1 through lecture 9
May have multiple components (a, b, c, …)
Circle one question you want to omit
Exam graded out of 4 equally weighted questions
You may bring one 3” x 5” note card for help on the exam
Front/back
No calculators!