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09 - Practice Test

1. What is one advantage of using a star topology?

If one connection fails, the rest of the network is unaffected

All of the above

There are few data collisions

They tend to be very reliable

2. "A set of rules that govern how devices communicate" is the definition of a …

Protocol

Device

Modem

Internet Standard

3. What does the term POP stand for?

proper ontological paper

PEP OLE Protocol

post office protocol

post old protocol

4. What is the difference between HTTP and HTTPS?

HTTPS is much slower and does not have any security inbuilt

Nothing

HTTP transmits data over the internet in a unsecure format whereas HTTPS uses encryption so that any data that is intercepted is meaningless.

HTTP transmits data across cables where as HTTPS is wireless

5. Data is transmitted across a network in packets. Items that each data packet will contain include:

Packet number /Sequence number

Error detection codes and payload

All of the above

Network address source and destination

6. What is one of the disadvantages of the star network?

If the server fails, the whole network will be down

None of the above

If the server fails, all the data will be transmitted to the other nodes much faster

If one of the nodes fails, the entire network will be affected

7. Which of the following topologies is likely to be the most expensive due to the cabling?

star

bus

All of them cost exactly the same.

ring

8. In a star network it is very difficult to add or remove a node as doing so will adversely affect the network

FALSE

TRUE

9. The robustness of a mesh network allows for some interesting uses and applications including:

All of the above

Music streaming devices around the home

Battlefield mesh networks to allow military solidiers to communicate with each other

Mobile hot spots

10. The advantage of using circuit switching is that it provides for …………………. associated with packets, making maximal use of available bandwidth for that communication

slow and steady transfer without the speed

limited transfer with overheads

continuous transfer without the overhead

super fast transfer with shared links and cables

11. In circuit switching, a route and its associated bandwidth is reserved from source to destination, making circuit switching relatively ……

None of the above

inefficient since capacity is reserved whether or not the connection is in continuous use

efficient since capacity is never reserved even if the connection is not in use

inefficient as it far slower and provides low quality service

12. Fill in the blanks for the following excerpt on packet switching

"In contrast, packet switching is the process of segmenting data to be transmitted into 
several smaller packets. Each packet is labeled with its .............................
........................ related packets, precluding the need for a dedicated path to
help the packet find its way to its destination. 
Each packet is dispatched independently and each may be routed via a different path"

circuit and cable

destination and a sequence number for ordering

IP address and MAC

MAC and sequence number for routing

13. For sending data the IP rules or protocols include adding the destination address to each data packet and….

adding its own address to indicate the source / where it came from

All of the above

Adding extra error correction information so that errors can be spotted and fixed

Dividing the message into packets

14. For receiving data packets IP protocols (rules) include accepting data packets that have its own address attached and…

Adding extra error correction information so that errors can be spotted and fixed

None of the above

Dividing the message into packets

ignoring all data packets that do not contain its own address

15. Both TCP and UDP are both protocols used for sending bits of data — known as packets — over the Internet. TCP isn't the only protocol!

FALSE

TRUE

16. UDP stands for User Datagram Protocol — a datagram is the same thing as a packet of information. It works…

completely differently to TCP and is more like SMTP and FTP

like the IP and FTP protocols combined together

similarly to TCP, but it throws all the error-checking stuff out.

exactly like TCP - there is no difference

17. When using UDP, packets are just sent to the recipient. The sender will not wait to make sure the recipient received the packet — it will just continue sending the next packets.

FALSE

TRUE

18. Wi-Fi Protected Access encryption (WPA2) is considered secure, even if a strong passphrase is not used (e.g. a single letter will suffice)

FALSE

TRUE

19. Wireless access technologies are commonly divided into categories, based on speed and distance

FALSE

TRUE

20. Wi-Fi most commonly uses the 2.4 gigahertz (12 cm) UHF and 5.8 gigahertz (5 cm) SHF ISM radio ______, these _____ are subdivided into multiple channels

protocols

bands

channels

apples

21. To connect to a Wi-Fi LAN, a computer has to be equipped with a …………………

wireless phone attachment

wireless network interface controller.

wireless PIN

wireless hotspot PIN

22. An example is: The TCP in layer 3 could only communicate with….

layer 3

layers 1,2,3,4

layers 2 and 4

layer 4

23. Which of the following are the names of layers in the four layer model?

Names of layers in the four layer model?
===============================
1.Application layer
2.Cable Layer
3.Transport Layer
4.ISP Layer
5.Internet Layer
6.TCP/IP Layer
7.Network / Data Link Access Layer

1,2,3,4

1,3,5,7

1,3,6,7

1,2,3,6

24. The protocols in this layer provide access to email files, and websites across an IP network

Network / Data Access Link Layer

Application Layer

Transport Layer

Internet (also called the 'Network') Layer

25. The TCP part of the TCP/IP protocol resides in this layer.

Note: It is responsible for dividing messages into packets, 
adding sequence numbers and error correction information. 
It also checks and deals with errors of received data packets.

Internet (also called the 'Network') Layer

Network / Data Access Link Layer

Transport Layer

Application Layer

26. The IP part of the TCP/IP protocol resides in this layer. It is responsible for managing the address of source and destination locations

Internet (also called the 'Network') Layer

Network / Data Access Link Layer

Transport Layer

Application Layer

27. Protocols on this layer (1) are Ethernet and WI-FI.

Note: Protocols on this layer are responsible for actually
transmitting or receiving data via cables or wireless. This layer is responsible for handling the device's physical connection to the network.

Application Layer

Network / Data Access Link Layer

Internet (also called the 'Network') Layer

Transport Layer

28. Protocols on this layer are FTP, HTTP, POP, IMAP and SMTP

Network / Data Access Link Layer

Transport Layer

Application Layer

Internet (also called the 'Network') Layer

29. The benefits of using layers include:

It is useful to map how layers relate and interact with each other. New protocols can just be slotted in

It can be difficult to conceptualise a complex system such as network communication

All of the above

It is useful for manufacturers so that when they are developing new hardware, they can ensure it is compatible with protocols

30. What does SMTP stand for?

Server Map Transform Protocol

None of the above

Simple Mail Transfer Protocol

Server Mail Transmission Protocol

31. Which of the following is not a real IP address?

192.168.2.138

192.168.2.3

192.168.2.338

192.168.2.156

32. Rules of Network Protocol include guidelines that regulate the following: network access method, allowed physical topologies and _____________

acceptable users and setting passwords for all internet users

types of modems and acceptable users (e.g. hackers are not allowed)

types of cabling, and speed of data transfer

None of the above

33. Ethernet uses an access method called CSMA/CD (Carrier Sense Multiple Access/Collision Detection). This is a system where …

each computer listens to the cable before sending anything through the network

each computer is made into a hotspot so it receives the internet from itself

each computer does not have to wait or listen to the cable and sends data directly to all nodes

each computer is connected to the other via satellite waves

34. This protocol is used to retrieve emails

POP

TCP

SMTP

IMAP

35. 14. What difference us a user likely to experience when upgrading from a b series router to an n series router?

The user is likely to experience faster data transmission (accept a faster network speed).

The user is likely to experience a slower speed

The user is likely to experience great heat

The user is likely to experience difficulty in setup and maintanence

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