10 Questions
What type of access network connects end systems to a router via a base station?
Wireless local area network (WLAN)
What is the primary function of a DSL Access Multiplexer (DSLAM)?
To split voice and data transmission over a single line
What is the typical transmission rate of a WiFi wireless access point?
All of the above
What type of network uses existing telephone lines to connect to a central office?
Digital Subscriber Line (DSL) network
What is the primary function of a router in an enterprise network?
To route packets within the network
What type of network is typically used in companies and universities?
Enterprise network
What is the primary function of a modem in a DSL network?
To convert analog signals to digital signals
What type of network is used to connect devices within a building or around a building?
Wireless local area network (WLAN)
What is the typical transmission rate of a DSL network?
24-52 Mbps
What type of network is used to connect devices to the Internet via a mobile, cellular network operator?
Wide-area cellular access network
Study Notes
Computer Networks 1 (CSE 231)
- Introduction to computer networks and the internet
- Course objectives: data communication, network models, data transmission, data encoding, data communication interface, data link control, multiplexing, and switching techniques
What is the Internet?
- Network: a collection of interconnected devices that communicate with each other
- Computer Network: a collection of interconnected devices that communicate with each other using software and hardware
- Objectives of computer networks: data communication, resource sharing, and communication
Network Criteria
- Performance: throughput, delay, and jitter
- Reliability: accuracy, precision, and correctness
- Security: authentication, authorization, and encryption
Data Communication
- What is Data Communication?: the process of transferring data between devices
- Components of Data Communication: sender, receiver, transmission medium, and message
- Data Communication Model: sender, receiver, transmission medium, and message
Transmission Media
- Guided Transmission Media: wired media, such as twisted pair, coaxial cable, and fiber optic cable
- Unguided Transmission Media: wireless media, such as radio waves, microwaves, and infrared
Transmission Modes
- Simplex: one-way transmission
- Half-Duplex: two-way transmission, but not at the same time
- Full-Duplex: two-way transmission, at the same time
Networking
- Topologies: physical and logical arrangement of devices
- Protocols: set of rules and standards for communication
Network Categories
- Local Area Network (LAN): a network that spans a small geographical area
- Wide Area Network (WAN): a network that spans a large geographical area
- Metropolitan Area Network (MAN): a network that spans a metropolitan area
Access Networks
- Residential Access Networks: home networks, using DSL, cable, or fiber
- Institutional Access Networks: school, company, and organization networks
- Mobile Access Networks: wireless networks, such as WiFi, 4G, and 5G
Access Networks (continued)
- Digital Subscriber Line (DSL): a type of broadband access using existing telephone lines
- DSL advantages: fast, dedicated, and shared
- Home Networks: wireless and wired devices, using cable or DSL modem and router
- Wireless Access Networks: shared wireless access network connects end system to router
- Enterprise Networks: companies, universities, and organizations, using Ethernet, switch, and institutional router
This quiz covers the basics of computer networks, including switching techniques, network models, and multiplexing.
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