IST 220 Exam 1

What three phases are required in a connection oriented communication network

1. Establish connection 2. Transmission of data 3. Release of connection

The minimum size of TCP header is ___________________ bytes

20 bytes

The minimum size of UDP header is ___________________ bytes

8 bytes

is an example of low frequency communication

AM Radio

_____________is used to resolve an IP address into a MAC address.

ARP

_________________ field in the TCP header allows a sender to determine when to retransmit a lost packet.

Acknowledgment number

ARP stands for

Address Resolution Protocol

__________ is an example of a modulation scheme to convert input data into analog signals

Amplitude Shift Keying

_______________ is the top most layer of the TCP/IP reference model

Application layer

_______________provides an interface to end-users, so that end users can interact with rest of the layers of the TCP/IP reference model

Application layer

______________is one of the layers in the TCP/IP reference model that provides support to variety of users applications and protocols running at the top most layer of the TCP/IP reference model.

Application layer

is an example of radio communication

Broadcasting

________________is an example of a Metropolitan Area Network

Campus network

_________________ field in the TCP header allows a receiver to ensure the integrity of received data (i.e., detecting bit-errors in the received TCP segments).

Checksum

In a ______________________, data packets arrived at the destination host in the order in which they were transmitted from the source host.

Circuit switched network

__________________ is an example of a connection oriented communication network

Circuit switched network

is a transmission medium commonly used for distributing TV signals (i.e., cable TV)

Coaxial

We need a _________________ to convert input data into Digital Signals.

Codec

What is meant by a "dedicated communication line"

Connection Established between source/destination is referred as "dedicated communication line" - means that it is reserved only for a particular source/destination and cannot by used by another communication entity

________________is an application layer protocol that assigns leased IP addresses to devices at run time.

DHCP

__________________ is an application layer protocol use to resolve/convert an Host Name into an IP address

DNS

is an example of microwave communication

Dish network and point to point device communications

DNS stands for

Domain Name System

DHCP stands for

Dynamic Host Configuration Protocol

_______________is an application layer protocol that allows users to transfer data files from one computer to others.

FTP

A digital communication system carries analog signals all the way from local consumer to service provider.

False

An Increase in noise power increases the value of SNR (assume a constant signal power)

False

Coaxial cable is one of least expensive wired medium for building Ethernet based local area networks (LANs).

False

DHCP assigns leased static IP addresses to devices at run time (T/F)

False

Fiber optics is more vulnerable to noise/interference than coaxial due to the sensitivity of its glass fiber

False

In a circuit switched network, the dedicated communication line is shared among multiple users. (T/F)

False

In circuit switched network, source and destination can exchange data without establishing a dedicated connection/circuit. (T/F)

False

Signal to noise ratio is directionlly proportional to noise power of a signal (T/F)

False

Signals transmit at microwave frequency band can be received by a destination system without the line of sight transmission. (T/F)

False

Telnet is an application layer protocol that allows users to connect to a remote server over a secure tunnel. (T/F)

False

e Twisted pair can be used to build high speed data networks due its strong resistance against noise and interference.

False

is a transmission medium commonly used in building high speed networks

Fiber Optics

FTP stands for

File Transfer Protocol

Low Frequency signals propagate using ______________ communication

Ground-Wave

________________ is a communication protocol that works with the web browsers to allow users to access web pages stored on the webs servers.

HTTP

________________is an example of a Local Area Network

Home area network

HTTP stands for

Hypertext Transfer Protocol

_____________________is an Internet layer protocol that is used for error reporting.

ICMP

__________________ is used for transmitting the datagrams from one network to another until it gets to the destination network.

IP

_______________ is a type of network that requires out of order sequencing

IP Network

________________is an example of a Wide Area Network

IP Network

IP stands for

Internet protocol

Signals generate at the microwave frequency bands need ________________ method to propagate.

Line of sight

_____________ is responsible to deliver the data packets from one hop to another hop until the data packets reach to the network for which the destination host is attached

Link layer

___________________ is an example of a networking infrastructure where individual LANs are connected together using backbone lines and that covers relatively larger geographical area than a single small network

MAN

We need a _________________ to convert input data into Analog Signals.

Modem

The transmitter could be a ______ or _____ device

Modem; codec

which one of the followings can be used as an encoding scheme

Non-return-to-zero-level and manchester

_____________ Reference model has 7 layers.

OSI

OSI stands for

Open Systems Interconnection

Chances that data packets get lost or delayed during the transmission are high in _____

Packet switched network

In a __________________, each packet might follow a different route to get to the final destination

Packet switched network

______________is one of the layers in the TCP/IP reference model that transmits the data at the byte levels using the communication channel

Physical Layer

Signals generate at _________________ bands are Omni-directional signals (i.e., propagates in all directions across the transmitting antenna). a. Local frequency

Radio Frequency

_____________is a physical layer device.

Repeater

______________is an Internet layer device.

Router

______________________is an application layer protocol that allows users to securely connect to a server remotely over an insecure network

SSH

SSH stands for

Secure Shell

Which field of the TCP header is used to deal with out of order sequencing of data packets?

Sequence number

Signals generate at radio frequency bands need ________________ method to propagates signals

Sky-Wave communication

is one of the elements of a communication model that generates input data that needs to be transmitted

Source

_______________is an intermediate device that provides forwarding functionality to move the data from one hop to other.

Switch

_________________ is referred as a connection oriented protocol that provides end to end message reliability

TCP

__________ reference model has 5 layers.

TCP/IP

________ is a user command program that allows users to remotely connect to a server over an insecure network (i.e., the Internet)

Telnet

TCP stands for

Transmission Control Protocol

TCP/IP stands for

Transmission Control Protocol/Internet Protocol

_______ carries either digital or analog signal depending on in which communication system it is deployed.

Transmission medium

The ______________ is needed to convert the input data into the desired form of signal a.

Transmitter

_____________is one of the layers in the TCP/IP reference model that provides end-to-end message reliability (i.e., reliable delivery of messages all the way from source host to destination host)

Transport layer

In Packet Switched Network, source and destination can exchange data without establishing a dedicated connection/circuit (T/F)

True

In a packet switched network, each packet must contain the source/destination addresses. (T/F)

True

Most service provider's local offices (distribution centers) are interconnected with each other through high speed digital lines

True

SNR is a ratio of signal power to noise power

True

Signals that broadcast at the radio frequency band can be received by anyone who is within the coverage area (vicinity) of the transmitting antenna. (T/F)

True

Signals that propagate at low frequencies (such as AM signals) are highly vulnerable to noise and interference due to their close proximity to the surface of the earth (T/F)

True

The value of SNR is relatively high for the coaxial cable than the twisted pair due to its less vulnerability for noise. (T/F)

True

Twisted pair is relatively more susceptible to noise and interference than fiber optics.

True

is a transmission medium commonly deployed in telephone (or voice) networks

Twister Pair

UDP stands for

User Datagram Protocol

__________________ is an example of a networking infrastructure that covers largest geographical area than any other type of network

WAN

______________is a Link layer (also called network interface layer) device.

bridge and switch

In a ______________________, all required resources are reserved prior to the transmission of data between the source and destination hosts.

circuit switched network

_____________ is a type of network where all the transmitted data packets between the source and destination have to follow a predetermined route.

circuit switched network

________________________can be defined as group of computers and other computing devices connected together over communication channels to facilitate communication

computer networks

__________________ is an example of a connection-less communication network

packet switched network