IST 220 - Exam #1

FALSE

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

_________________ is used to resolve an IP address into a MAC address.

ARP

ARP stands for:

Address Resolution Protocol

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

Amplitude Shift keying (ASK)

FALSE

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

The input data could be ________

Analog or Digital

_________________ 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 the top most layer of the TCP/IP reference model

Application layer

_________________ is a Link layer (also called network interface layer) device.

Both Bridge and Switch

_____________ is an example of radio communication

Broadcasting

_________________ is an example of a Metropolitan Area Network

Campus Network

Packet Switched Networks

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

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

Circuit Switched Network

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

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

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

Computer Network

_________________ 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

DNS stands for:

Domain Name System

DHCP stands for:

Dynamic Host Configuration Protocol

What three phases are required in a connection oriented communication network?

Establish connection, transmission of data, & Releasing the Connection

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

FALSE

In Circuit Switched Network, source and destination can exchange data without establishing a dedicated connection/circuit

FALSE

In a Circuit Switched Network, the dedicated communication line is shared among multiple users.

FALSE

Signals that transmit at microwave frequency band can be received by a destination system without line of sight transmission.

FALSE

Switch is an Internet layer device that examines the header of each packet to determine its destination IP address.

FALSE

Telnet is an application layer protocol that allows users to connect to a remote server over a secure tunnel.

FALSE

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

FALSE

UDP is a transport layer protocol that offers reliable delivery of user data all the way from the source host to the destination host.

FALSE

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

FTP

FALSE

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

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

HTTP stands for:

Hyper Text 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

Packet Switched Network

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

IP stands for:

Internet Protocol

__________________is an example of a computer network where limited number of computers are connected together to facilitate communication and that spans a small geographical area

LAN

_________________ 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

__________ which one of the following can be used as an encoding scheme

Non-return-to-zero inverted (NRZ-I) & Manchester

_______________ Reference model has 7 layers.

OSI

OSI stands for:

Open System Interconnection

__________________ is an example of a connection-less communication network

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

_________________ 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

FALSE

Signal to noise ratio is directionally proportional to noise power of a signal

Radio Frequency

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

TRUE

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

Microwave frequency

Signals that generate at _________________ bands are highly directional signals (i.e., propagates in one specific direction).

Line of Sight Transmission (LoS)

Signals that generate at microwave frequency bands need ________________ method to propagates signals

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

In Packet Switched Network, each packet must contain the source/destination addresses.

TRUE

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

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 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

TRUE

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

TRUE

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

TRUE

_______________ is a user command program that allows users to remotely connect to a server over an insecure network

Telnet

Transmitter

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

Modem & Codec

The transmitter could be a _______or a ______ device

TCP/IP stands for:

Transmission Control Protocol/ Internet Protocol

_________________ is one of the layers in the TCP/IP reference model that provides end-to-end message reliability

Transport Layer

UDP stands for:

User Diagram Protocol

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

WAN

Modem

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

Codec

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

Transmission Medium

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

ASK/PSK/FSK

__________ is an example of a modulation scheme.

Twisted Pair

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

Fiber Optics

_____________ is a transmission medium commonly used in building high speed networks

AM Radio

_____________ is an example of low frequency communication

Disk Network & Point-to-Point Device communication

_____________ is an example of microwave communication

TCP/IP

_______________ Reference model has 5 layers.

Home Area Network

_________________ is an example of a Local Area Network

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.

What is protocol?

a set of rule that define how the data is going to be exchanged b/w the 2 communication entities

12. The input data can be transmitted either as ________ signals or ___________ signals

analog , digital

We call it leased..... ?

because each dynamic IP address has a certain time period. When time expires, the IP add. will return to the IP address pool unless the leased is renewed.

We call it dynamic .... ?

each time when you connect to the network, the IP address may change

"Dedicated Communication Line"

means that it is reserved only for a particular Source/Destination and cannot be used by another communication entity