Computer Networks Lecture 2: Internet Structure and Data Transmission Methods

What is the average transmission rate offered by the 802.11 (WiFi) protocol in Wireless LANs?

450 Mbps

Which wireless technology is provided by telecommunications companies and offers network coverage within 1-5 km with a speed of 1-10 Mbps?

GSM

What type of network coverage is supported by Wireless LANs?

Within building (100 ft.)

In a wireless network, what does GSM stand for?

Global System for Mobile communication Signup and view all the answers

Which physical media is considered when a bit travels through a series of links and routers?

A combination of different media including wireless, fiber-optic, and copper cables Signup and view all the answers

What is the average speed offered by wide-area wireless networks using 3G technology?

10 Mbps Signup and view all the answers

What is the main difference between guided and unguided physical media?

Guided physical media signals propagate in solid media, while unguided signals propagate freely through electromagnetic radio waves Signup and view all the answers

What type of information is carried by the light pulses in fiber optic cables?

Bits characterized by high-speed operation Signup and view all the answers

What is the transmission rate of Category 6 twisted pair copper?

10 Gbps Signup and view all the answers

Which method of data transfer establishes a dedicated communication path between two devices before data transmission?

Circuit switching Signup and view all the answers

What is a characteristic of circuit switching?

The circuit remains dedicated for the duration of the session Signup and view all the answers

What is the main disadvantage of electro-magnetic radio waves as a physical media?

Obstruction by objects Signup and view all the answers

What does packet switching involve?

Communication method where data is divided into smaller units called packets Signup and view all the answers

What is the main difference between Time Division Multiplexing (TDM) and Frequency Division Multiplexing (FDM)?

$TDM$ involves dividing the channel into time slots, while $FDM$ involves dividing the channel into frequency slots Signup and view all the answers

$10Gbps$ data transmission is typically associated with which type of twisted pair copper?

$Category 6$ Signup and view all the answers

$Packet switching$ differs from $circuit switching$ in that:

$Packet switching$ establishes a dedicated communication path before data transmission, while $circuit switching$ divides data into smaller units called packets Signup and view all the answers