comp4320 M1

A 1 kilobits/s (Kbps) bit rate is _____________ bits per second.

1,000

A 1 megabits/s bit (Mbps) rate is _____________ bits per second.

1,000,000

A 1 gigabits/s (Gbps) bit rate is _____________ bits per second.

1,000,000,000

The OSI reference model has _____ end-to-end layers and _____ point-to-point layers.

4, 3

The Internet is a network covering typically _____

A planet

A wide area network (WAN) is a network covering typically _____

A planet Country Continent

In the OSI reference model, the [name1] layer receives service directly from the presentation layer.

Application

In the OSI reference model, this layer is the closest to the "user".

Application

In the OSI reference model, this layer is an intruder (i.e., it does not belong within this list of options).

Application ------------------------------------------ Physical None of the above Network Application Data Link

In the OSI reference model, these layers are active on only devices at the end points of a conversation.

Application Transport Session Presentation

_________ is the design issue that consists of avoiding that a sender overwhelms the receiver and any intermediary nodes.

Congestion control

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Check the protocol(s) that belong(s) to the application layer

DNS SMTP HTTP SSH

In the OSI reference model, the physical layer offers service directly to the [name1] layer.

Data Link

In the OSI reference model, this layer is an intruder (i.e., it does not belong within this list of options).

Data Link ------------------------------------------ None of the above Application Presentation Data Link Transport

This issue is not a network software issue

Energy/Power management ------------------------------- Energy/Power management Addressing, naming Routing Error detection or correction None of these answers

_________ ________ is the design issue that consists of correcting errors in the received information.

Error correction

_________ is the design issue that consists of avoiding that a sender overwhelms a receiver.

Flow Control (Congestion Control is Receiver + Nodes)

Check the protocol(s) that belong(s) to the presentation layer

IEEE 754

A wireless LAN uses most likely the ________ standard.

IEEE 802.11

Wifi uses the ____________ standard.

IEEE 802.11

Your wireless network at home (to access the Internet) uses most likely the ________ standard.

IEEE 802.11

Ethernet uses the ____________ standard.

IEEE 802.3

Check the protocol(s) that belong(s) to the network layer

IPv6 IPv4

In the OSI reference model, adjacent layers use an [name1] to communicate.

Interface

Check all that apply to the OSI reference model.

It is a good education tool to understand networks It is an international standard of networks It is a thorough representation of computer networks

Your wireless network at home is a _____

LAN

This issue is not a network software issue

Memory footprint --------------------------------------- Scalability None of these answers Confidentiality or authentication Memory footprint Routing

Today, most wired LANS run at speeds from ________ up to ________ .

NOT 1 Mbps up to 100 Gbps (both could be wrong, or just one could be wrong)

A(n) __________ is a set of rules defining communications between peer layers.

NOT interface Probably protocol

In the OSI reference model, the [name1] layer provides service directly to the transport layer.

Network

In the OSI reference model, the [name1] layer receives service directly from the data link layer.

Network

In the OSI reference model, the transport layer does not provide/perform this (these) service/function(s).

None of these answers

The physical layer offers in general these services/functions.

None of these answers

This issue is not a network software issue

None of these answers ------------------------------------ Routing Confidentiality or authentication Scalability None of these answers Congestion or flow control

Bluetooth is a technology that could work for these types of networks

PAN (Personal Area Network) LAN (Local Area Network)

______________ links connect individual pairs of machines.

PARTIAL NOT bus

These are the underlying design constraints that resulted in what the OSI Reference Model is today

PARTIAL - 3.13/6.25 The flow of information through interfaces must be minimal NOT The flow of information through protocols must be minimal.

The transport layer provides this (these) service(s).

PARTIAL - 8.33/12.5 handles congestion detects transmission errors NOT finds paths between senders and receivers.

A local area network (LAN) is a network covering typically _____

PARTIAL(1.67/5): One small campus

In the OSI reference model, these layers are point to point layers.

Physical Data link Network

For a conversation, these layers may be active on all intermediary devices in the OSI reference model

Physical Data Link Network

This (These) layer(s) are part of the OSI Reference Model.

Physical Data Link Network

For a conversation, these layers (OSI reference model) will be active on all endpoints

Physical Transport Data Link Application Network

In the OSI reference model, this layer deals with how different machines map data in memory.

Presentation

In the OSI reference model, this layer is an intruder (i.e., it does not belong within this list of options).

Presentation ------------------------------------------ None of the above Network Data Link Presentation Physical

Transmission lines on WANs are in general made of _______.

Radio links optical fiber copper wire

_________________ is the design issue that consists of finding a path (list of switchs to traverse) between a source host and a destination host.

Routing

In the OSI reference model, the [name1] layer provides service directly to the presentation layer.

Session

In the OSI reference model, the [name1] layer receives service directly from the transport layer.

Session

In the OSI reference model, this layer is an intruder (i.e., it does not belong within this list of options).

Session ------------------------------------------ Network Session None of the above Physical Data Link

This course will focus on two reference models.

TCP/IP Reference Model OSI Reference Model

The key objectives/benefits of a layered design are:

The serviced layer does have to worry about the details belonging to the serving layer (service provider) Simplify a complex function/service by partitioning it into smaller functions

In the OSI reference model, the [name1] layer provides service directly to the session layer.

Transport

In the OSI reference model, the [name1] layer receives service directly from the network layer.

Transport

In the OSI reference model, this end-to-end layer deals with addressing and congestion control (besides other functions).

Transport

In the OSI reference model, this end-to-end layer deals with error control and flow control (besides other functions).

Transport

In the OSI reference model, this layer is the lowest end to end layer (closest to the physical layer).

Transport

The OSI Reference Model includes this (these) layer(s).

Transport Physical Application

Check the protocol(s) that belong(s) to the transport layer

UDP TCP

____________ is a popular wireless MAN protocol.

WiMax

Bluetooth is a technology that could work well to connect ______

a central unit (computer) with the standard inputs/outputs Wireless speakers to an entertainment center Audio system to your cellphone in a car

The purpose of each layer is to offer services to the layer just ________ it.

above

_________ is the design issue that consists of identifying the senders and receivers.

addressing

An interface defines the primitive operations and services between _________ layers.

adjacent

The presentation layer provides this (these) service(s).

allows machines with different data representations to communicate.

The rules governing the request/delivery of a service between adjacent layers is called _______________.

an interface

Complete the words starting with the indicated first letter. Do not repeat the first letter. The physical layer deals with transporting r__________ b___________

aw; its

Each layer requests service(s) from the layer just ________ it.

below

On a ______________ medium, frames (packets) sent by any machine on that medium are received (heard) by all other machines on the medium.

broadcast

The application layer provides this (these) service(s).

communicates with the end user. allows the end users to use the network services.

In the OSI reference model, the [name1] layer provides service directly to the network layer.

data link

The transport layer offers in general these services/functions.

error control congestion control addressing/naming flow control

________________ consists of correcting errors in the received information.

error correction

_________ ________ is the design issue that consists of finding errors in the received information.

error detection

On networks, the machines that run users programs (applications) are most likely called ________.

hosts

A network is a set of ___________ devices which can communicate.

independent

A(n) __________ is a set of rules defining communications between adjacent layers.

interface

To reduce their design complexity, most networks architectures are organized as ___________.

levels, stacks, layers

On a ______________ network, frames (packets) sent by any machine on that link are received (heard) by a subset of machines.

multicast

A header is a message exchange between Layer n and Layer ________.

n

A set of layers and protocols is called a _______ __________.

network architecture

A protocol defines the communications rules between _________ layers.

peer

Layers at the same level on two communicating machines are called _________ .

peer layers

In the OSI reference model, the [name1] layer provides service directly to the data link layer.

physical

In the OSI reference model, the [name1] layer provides service directly to the application layer.

presentation

In the OSI reference model, the [name1] layer receives service directly from the session layer.

presentation

Peer layers use a [name1] to communicate.

protocol

A list of the protocols used by certain system, one protocol per layer, is called a _______ __________.

protocol stack

Complete the words (do not repeat the first letter(s) already provided) The functions/services offered by the data link layer are: 1) F___________ 2) E___________ 3) Fl___________

raming; rror control; ow control

Layered design consists of ________________.

restricting communications to adjacent or peer layers layers hiding details from each other dividing a complex task in multiple subtasks

On WANs, switches are called ___________.

routers

Designs that continue to perform well when the network gets large are said to be ___________.

scalable

Congestion Control insures that a [Select] does not overwhelms the [Select]

sender, intermediary nodes and receiver

The number of layers in the OSI Reference model is ____________ .

seven

The application layer offers in general these services/functions.

specialized services to users that lower layers do not offers addressing/naming

___ connect two or more ___

switches, transmission lines

Point-to-point transmission with exactly one sender and exactly one receiver is sometimes called ___________.

unicasting