Chapter 1 Test Questions - ICT Introductory Concepts

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T-1 leased lines run at a speed of about ________.

1.5 Mbps.

Switches are Layer ___ devices.

2.

The Data Link Layer is layer number ___.

2.

T-3 carrier circuits offer speeds of about __________.

4300 kbps.

Hosts are Layer ____ devices.

5.

How many layers of the TCP/IP-OSI architecture are needed to get a message from a sending host to a receiving host?

5.

What is a noise spike?

A large, brief increase in the noise energy.

Sound, temperature, & time are all examples of ______ data.

Analog.

As signals propagate, they become weaker due to ___________.

Attenuation.

_______ Network Layers are needed to carry a message across the Internet.

Between.

Telecommunications is measured in ____ per second and in multiples of ____.

Bits, 1000.

A network where all hosts are attached to one common media that allows communications among the hosts is known as a ___ typology.

Bus.

T-1, T-3, and DSL are all examples of _______ ________.

Carrier circuits.

The worldwide phone system is based on _______ switching, where an electrical circuit is created each time data are sent.

Circuit switching.

In optical fiber, light travels through the ____.

Core.

_________ is a special case of EMI in which conductors in a cable interfere with each other.

Crosstalk.

The purpose of ____ is to assign an IP address and other identifiers to a host.

DHCP.

Routers make packet forwarding decisions based on a packet's ___________ __ _______.

Destination IP Address.

When one pair in a UTP cord interferes with signals in other pairs, this is ___ & _________.

EMI, crosstalk.

Bits are commonly grouped into sets of _____ bytes, called ______.

Eight, octets.

The process of putting a message inside of another message so it can be transmitted is called _____________.

Encapsulation.

The ___ mandates that electronic equipment may not emanate more than a specified level of radio interference.

FCC.

_____ _____ is a WAN technology used to interconnect LANs.

Frame relay.

___________ allows communication simultaneously between two hosts.

Full-duplex.

A ____ is any Layer 5 telecommunication device capable of propagating data.

Host.

42.18.248 is an __ address.

IP.

Does IP or TCP operate at the Internet layer?

IP.

By following standards and protocols when manufacturing hardware, vendors ensure ________________ of their products.

Interoperability.

In the worldwide phone system, the media between the customer premises and the local switch is called the _____ ____, while a carrier circuit that interconnects switches is called a _____ ____.

Local loop, trunk line.

A ____ network typology is one that uses a series of interconnecting routers that creates multiple pathways between points on a network.

Mesh.

Routers are usually connected in a ____ typology.

Mesh.

A _____ connection is a point-to-point topology that allows two hosts or devices to communicate through a circuit that interconnects devices.

Modem.

What is the process by which digital data are converted to sound?

Modulation.

A modem is an example of a _________.

Modulator.

The process of converting human-friendly names into numeric addresses is known as ____ __________.

Name resolution.

_______ ________ is the physical arrangement of a network's computers, switches, routers, and transmission links.

Network typology.

Does UDP perform error correction?

No.

Is TCP connectionless?

No.

Is UDP reliable?

No.

The ___ portion of the hybrid architecture involves Layers 1 & 2, while the ______ portion deals with Layers 3 through 5.

OSI, TCP/IP.

The ___ protocol provides an encrypted connection to a remote computer that typically allows login and commands to be executed on the remote computer.

SSH.

A signal transmitted one bit at a time is known as ______ communication.

Serial.

Because of greater distances, WAN transmission speeds are ______ than LAN transmission speeds.

Slower.

A ______ specifies a particular application on a particular host.

Socket.

IP_ADDRESS:PORT_NUMBER represents a ______.

Socket.

The ____ network typology is the most common LAN typology in which hosts are interconnected through a series of hubs and switches.

Star.

A ____ ____ can be used to synchronize a receiver to an incoming data stream.

Sync word.

Who creates Internet infrastructure standards?

The IETF.

Which layer is responsible for between-network routing?

The Internet Layer.

Which layer is responsible for signaling?

The Physical Layer.

Which layer in the TCP/IP-OSI hybrid architecture governs end-to-end transmission between two hosts across an internet?

The Transport Layer.

Today, the main benefit of optical fiber compared to UTP is ______________________.

The ability to span greater distances.

In LANs, optical fiber is typically used in _____ _____.

Trunk lines.

In an internet, different individual networks are connected by _____ lines, _______ switches, & _______.

Trunk, carrier, routers.

What is the dominant scheme for encoding data by a computer?

Unicode.

Does UDP perform error-checking?

Yes.

Is IP connectionless?

Yes.

Is TCP reliable?

Yes.


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