CSCI 460: Computer Networks and Communications

Final Exam: Open Book
Location: Online
Total Marks: 100

Duration: 1.5 hours, starting from 1:00PM, December 16, 2020. You will be able to start the exam any
time after 1:00PM, December 16, 2020 within 24 hours. You will need to complete the exam before
1:00PM, December 17, 2020.


Exam Mode and Question Types
1. Exam will be conducted through VIULearn Quizzes System.
2. The exam will have true/false, multiple choice, multi-select, short answer, and written
response questions on computer networks and communications topics listed below.
3. 50% questions will be from Midterm 1 and Midterm 2 topics.
4. 50% questions will be from the rest of the topics.

Topics
1. Introduction
a. What is computer network?
b. Types of networks
i. Wired and wireless
ii. Local Area Network
iii. Wide Area Network
iv. Internetworks (Internet)
c. Network Protocols and Layers
d. Network Reference Models
i. OSI Reference Model
ii. TCP/IP Reference Model

2. Network Devices
a. Network Interface Card (NIC)
b. Hub
c. Bridge
d. Switch
e. Wireless Access Point (WAP)
f. Router
g. Firewall
3. Network Topologies
a. Bus
b. Star
c. Ring
d. Hierarchical
e. Point-to-point
f. Mesh
g. Hybrid

4. Physical Layer
a. Wired Transmission
i. Twisted Pair
ii. Coaxial Cable
iii. Fiber Optics
b. Wireless Transmission
i. Frequency Spectrum
ii. Radio Transmission
iii. Microwave Transmission
c. Communication Satellites
i. Geostationary Satellites
ii. Medium-Earth Orbit Satellites
iii. Low-Earth Orbit Satellites
d. Public Switched Telephone Network
i. Modems
ii. Digital Subscriber Lines
iii. Fiber to Home
iv. Circuit Switching, Message Switching, and Packet Switching
e. Cable Networks
i. Cable Modems
5. Data Link Layer
a. Framing
b. Error Control
c. Flow Control
d. Error-Correcting Code
i. Hamming Distance
ii. Hamming Code
e. Error-Detecting Code
i. Parity
ii. Interleaved Parity
iii. CRC
f. Data Link Layer Protocols for Flow Control
i. Stop and Wait Protocol
ii. Sliding Window Protocol
iii. 1-bit Sliding Window Protocol
iv. Sliding Window Protocol with Go Back N
v. Sliding Window Protocol with Selective Repeat
6. Medium Access Control Sublayer
a. Channel Allocation Problem
b. Multiple Access Protocols
i. Pure and Slotted ALOHA
ii. Carrier Sense Multiple Access (CSMA)
iii. CSMA with Collision Detection (CSMA/CD)
iv. Binary Exponential Backoff Algorithm in CSMA/CD
v. CSMA with Collision Avoidance (CSMA/CA) for Wireless
c. Classic Ethernet
d. Switched and Gigabit Ethernet
7. Network Layer
a. Store and Forward Packet Switching
b. Datagrams
c. Routers
d. Routing Algorithms
i. Shortest Path Routing
ii. Distance Vector Routing
iii. Link State Routing
e. Internet Protocol (IP)
i. IP Packet
ii. IP Address, Subnet, and CIDR
iii. Network Address Translation (NAT)
iv. Address Resolution Protocol (ARP)
v. Dynamic Host Configuration Protocol (DHCP)
vi. Internet Control Message Protocol (ICMP)
vii. Routing Information Protocol (RIP)
viii. Open Shortest Path First Protocol (OSPF)

8. Transport Layer
a. User Datagram Protocol (UDP)
b. Transport Control Protocol (TCP)
i. TCP Segment Header
ii. TCP Connection
iii. TCP Flow Control
iv. TCP Congestion Control
v. TCP Retransmission Timer
9. Application Layer
a. DNS
i. Name Space
ii. Resource Record
iii. DNS Server
b. HTTP
i. URL
ii. HTML
iii. HTTP Methods
iv. HTTP Headers
c. FTP
i. Control and Data Connections
ii. Commands and Replies
10. Wireshark packet tracing and analysing covered in Lab 1, Lab2, Lab3, Lab4, and Lab5.
11. POSIX system calls and the library functions covered in Project 1 and Project2.


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