Data Communication and Telecommunications

What are the characteristics of data communication channels?

• Transmission Speed, Transmission Mode, Transmission direction

• Bounded media, Unbounded media

• Host Computer, Front end Processor

• Access Control, Network control & Management

What are the two types of transmission modes?

• Synchronous and Asynchronous

• Simplex and Half duplex

• Full duplex and Half duplex

• Bounded and Unbounded

What is the purpose of a modem?

• To convert digital signals into analog signals and vice-versa

• To manage the switching of calls within a PBX

• To control the transmission path across networks

• To establish access between different devices

What is a Private Branch Exchange (PBX)?

• A telephone system within an enterprise that switches calls between users

• A digital communication network that uses the public telephone network

• A group of computers that share a common communications line

• A collection of wires through which data is transmitted

What are the principles of Integrated Services Digital Networks (ISDNs)?

• Openness, Modularity, Communication based intelligence, Network management and control, Integrated products and services

• Sender, Channel, Receiver, Modem, Switch

• Bounded media, Unbounded media

• Access Control, Transmission control, Network control

What is a Local Area Network (LAN)?

• A group of computers and associated devices that share a common communications line

• A collection of computers connected over a large geographic area

• A device that separates two or more network segments

• A software that coordinates controls and manages the complete operation of the network

What distinguishes a Wide Area Network (WAN) from a Local Area Network (LAN)?

• The distance between each of the networks

• The number of devices connected

• The type of transmission used

• The bandwidth of the network

What are the different types of set up a WAN?

• Direct distance dialing (DDD)

• Wide area telephone service lines (WATS)

• Leased lines

• Satellites

What are Value Added Networks (VANS)?

• Public data networks that add value to basic communication services

• Networks that only provide basic communication services

• Networks that do not require a monthly fee

• Networks that are only used for video conferencing

What is a distributed system?

• A distributed system is a single computer that performs all tasks independently.
• A distributed system is a collection of devices that do not communicate with each other.
• A distributed system is a type of cloud storage service.
• A distributed system is a network of independent computers that work together to achieve a common goal.