COMP 3533 Network Infrastructure & Security Final Exam
Study online at https://quizlet.com/_iqgvd8
1. What is the high Billions of connected *devices* or *hosts* running *network apps*. Chunks of
level structure of data called *packets* pass through *routers* and *switches*.
the internet?
Some examples of communication links are *fiber, copper, radio & satellite*.
The connection of multiple devices via communication link is a *network*. The
Internet is a *network of networks*.
*Protocols* govern how data is sent, received, and interpreted (Ex: HTTP, TCP, IP,
Wi-Fi, Ethernet, 4G/5G)
2. What is the inter- Infrastructure that provides services to applications. Provides a *programming
net from a ser- interface* to applications such as "hooks" allowing sending & receiving apps to
vice view? "connect" to and use internet transport services.
*Analogous to the postal service*
3. What is a proto- They define the format and order of messages sent and received among network
col? entities, and actions taken on message transmission / receipt
4. What is the Net- Hosts, Applications, Access Networks (wifi, ethernet, 4G/5G). Everything that
work Edge creates or consumes data
Analogous to the *neighbourhoods* of the internet
5. What is the Net- Routers, fiber links, ISPs. Everything that moves data across long distances
work Core?
Analogous to the *highway system* that moves packets
6. What is Frequen- A method of *cable based access* where multiple different channels holding
cy Division Multi- different information (video, data, control) are transmitted on the same physical
plexing (FDM) ? system at different frequency bands.
7.
, COMP 3533 Network Infrastructure & Security Final Exam
Study online at https://quizlet.com/_iqgvd8
What is Hybrid A *cable based access* method which uses fiber optic cables to move signals.
Fiber Coax (HFC) *Asymmetric speeds optimized for average user who downloads more than up-
? loads*
40Mbps - 10 Gbps down
30-100Mbps up
8. What is a Digital Network access comes through existing telephone lines. A DSLAM as the telecom
Subscriber Line separates phone signals from computer signals. Use their own protocol for
(DSL) ? transmission
9. How do home Modem/Router connects to central office, devices can either connect to Wi-Fi from
networks access the router or ethernet
the internet?
10. How do Wireless WLANs have a ~100ft range versus Cellular with 10's of kms
Local Area Net-
works (WLANs) WLAN is faster and more reliable, Cellular has poorer speed and reliability
and Cellular Ac-
cess Networks
compare as wire-
less access net-
works?
11. What are Enter- Access Networks used by companies, universities, etc. Mix of wired, wireless link
prise Networks? technologies, connecting a mix of switches and routers.
12. What is pack- Hosts break application layer messages into packets, and the network forwards
et-switching? them from one router to the next from source to destination
13. What are the Forwarding (switching) --> local action. Moves arriving packets from router's input
2 core functions link to appropriate output link
Routing --> global action. Determine source-destination paths taken by paths
, COMP 3533 Network Infrastructure & Security Final Exam
Study online at https://quizlet.com/_iqgvd8
of the Network
Core?
14. What does R Bandwidth / link speed
measure in pack-
et switching?
15. What is 'stop and A router receiving bits from another router must stop and wait for the entire
wait' in the for- package to arrive, at which point it is *stored*. Once it knows where to send it
warding process? next, it will *forward*
16. What is When work arrives faster than it can be serviced and is waiting to be transmitted
Queueing in the on the output link
packet-switching
process?
17. What is queue- Delay --> time from the moment a bit arrives to the queue until it starts to be
ing *delay* and served
queueing *loss*?
Loss --> Packets that are dropped (lost) if memory (buffer) in the router fills up
18. What is Circuit end-to-end resources allocated to and reserved for a "call" between source and
Switching? destination
19. What are Fre- FDM --> optical, electromagnetic frequencies divided into narrow frequency
quency Divi- bands. Each 'call' allocated its own band.
sion Multiplexing
(FDM) and Time TDM --> Time divided into slots. Each 'call' is allocated periodic slot(s).
Division Multi-
plexing (TDM)?
20. What is the struc- A network of networks.
ture of the inter-
net?
Study online at https://quizlet.com/_iqgvd8
1. What is the high Billions of connected *devices* or *hosts* running *network apps*. Chunks of
level structure of data called *packets* pass through *routers* and *switches*.
the internet?
Some examples of communication links are *fiber, copper, radio & satellite*.
The connection of multiple devices via communication link is a *network*. The
Internet is a *network of networks*.
*Protocols* govern how data is sent, received, and interpreted (Ex: HTTP, TCP, IP,
Wi-Fi, Ethernet, 4G/5G)
2. What is the inter- Infrastructure that provides services to applications. Provides a *programming
net from a ser- interface* to applications such as "hooks" allowing sending & receiving apps to
vice view? "connect" to and use internet transport services.
*Analogous to the postal service*
3. What is a proto- They define the format and order of messages sent and received among network
col? entities, and actions taken on message transmission / receipt
4. What is the Net- Hosts, Applications, Access Networks (wifi, ethernet, 4G/5G). Everything that
work Edge creates or consumes data
Analogous to the *neighbourhoods* of the internet
5. What is the Net- Routers, fiber links, ISPs. Everything that moves data across long distances
work Core?
Analogous to the *highway system* that moves packets
6. What is Frequen- A method of *cable based access* where multiple different channels holding
cy Division Multi- different information (video, data, control) are transmitted on the same physical
plexing (FDM) ? system at different frequency bands.
7.
, COMP 3533 Network Infrastructure & Security Final Exam
Study online at https://quizlet.com/_iqgvd8
What is Hybrid A *cable based access* method which uses fiber optic cables to move signals.
Fiber Coax (HFC) *Asymmetric speeds optimized for average user who downloads more than up-
? loads*
40Mbps - 10 Gbps down
30-100Mbps up
8. What is a Digital Network access comes through existing telephone lines. A DSLAM as the telecom
Subscriber Line separates phone signals from computer signals. Use their own protocol for
(DSL) ? transmission
9. How do home Modem/Router connects to central office, devices can either connect to Wi-Fi from
networks access the router or ethernet
the internet?
10. How do Wireless WLANs have a ~100ft range versus Cellular with 10's of kms
Local Area Net-
works (WLANs) WLAN is faster and more reliable, Cellular has poorer speed and reliability
and Cellular Ac-
cess Networks
compare as wire-
less access net-
works?
11. What are Enter- Access Networks used by companies, universities, etc. Mix of wired, wireless link
prise Networks? technologies, connecting a mix of switches and routers.
12. What is pack- Hosts break application layer messages into packets, and the network forwards
et-switching? them from one router to the next from source to destination
13. What are the Forwarding (switching) --> local action. Moves arriving packets from router's input
2 core functions link to appropriate output link
Routing --> global action. Determine source-destination paths taken by paths
, COMP 3533 Network Infrastructure & Security Final Exam
Study online at https://quizlet.com/_iqgvd8
of the Network
Core?
14. What does R Bandwidth / link speed
measure in pack-
et switching?
15. What is 'stop and A router receiving bits from another router must stop and wait for the entire
wait' in the for- package to arrive, at which point it is *stored*. Once it knows where to send it
warding process? next, it will *forward*
16. What is When work arrives faster than it can be serviced and is waiting to be transmitted
Queueing in the on the output link
packet-switching
process?
17. What is queue- Delay --> time from the moment a bit arrives to the queue until it starts to be
ing *delay* and served
queueing *loss*?
Loss --> Packets that are dropped (lost) if memory (buffer) in the router fills up
18. What is Circuit end-to-end resources allocated to and reserved for a "call" between source and
Switching? destination
19. What are Fre- FDM --> optical, electromagnetic frequencies divided into narrow frequency
quency Divi- bands. Each 'call' allocated its own band.
sion Multiplexing
(FDM) and Time TDM --> Time divided into slots. Each 'call' is allocated periodic slot(s).
Division Multi-
plexing (TDM)?
20. What is the struc- A network of networks.
ture of the inter-
net?
