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
