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WorksheetsJ277 1.3 Computer networks, connections and protocols
Total questions: 72
Worksheet time: 1hrs 17mins
A protocol is a set of (a) which dictate how devices communicate with each other.
This protocol is used to transfer files from a computer to a website.
(acronym or full name accepted)
(a)
This protocol is used to load pages of a website.
(a)
This protocol is used to send emails to email servers
(a)
This protocol downloads emails onto your device.
(There are two options)
(a)
What is an advantage for IMAP?
If you delete the email it is still stored in the server
You do not have to be logged in to the Internet to read your messages
Which protocol would be most suitable for accessing a banking website?
HTTPS
FTP
HTTP
Select the correct definition of TCP / IP
TCP - splits and reassembles data packets
IP - assigns and reads packet addresses
TCP - assigns and reads packet addresses
IP - splits and reassembles data packets
The physical layout of a computer network is called its
topology
geographical location
hierarchy
protocol
architecture
Identify this toplogy
WAN
LAN
Star
Mesh
Ring
What is the minimum number of computers needed to create a network?
1
2
3
4
What does the 'L' stand for in 'LAN'?
Large
Loop
Local
Lollypop
What does HTTPS stand for?
Hyper Text Transfer Protocol
Hyper Text Transport Protocol Secure
Hyper Text Transport Protocol
Hyper Text Transfer Protocol Secure
Select all the TRUE statements:
A peer-to-peer network has one central controlling computer.
Peer-to-peer networks are easier to set up than client-server networks
Peer-to-peer networks allow individual devices to share files between each other.
Peer-to-peer networks are commonly used in large organisations
It is easier to implement security procedures throughout a client server network than a peer to peer network.
What is a standalone computer?
A computer that is not connected to a network
A computer that is being used as a server
A computer that does not have any peripherals attached to it
A computer that is used by only one person
Which of these is a characteristic of a LAN?
It covers a wide geographical area
Computers are connected together using a leased line or a satellite
Users can share files and peripherals
Data can only be transmitted at a very slow rate
Where are you most likely to find a peer-to-peer network?
In a large organisation
In a home
In a large office
Across several offices in a company
Which of these is the correct definition of a router?
Forwards data packets along a network
Corrects errors that are found in data packets
A type of transmission media that provides the greatest bandwidth
A server within a network
Which transmission media is capable of having a much higher bandwidth?
Coaxial
Twisted pair cable
Plastic
Fibre optic
Which if these terms refers to the maximum rate at which data can be transferred?
Error detection
Packet switching
Bandwidth
Transmission media
To access a wireless network, a device needs a wireless (a) connected to or built into it.
What does WAP stand for?
Wireless access point
Wifi access point
Wireless application protocol
Wifi application protocol
What is not a benefit of networking?
Share hardware
Share software
Share viruses
Share workstations
Which type of transmission media is the least expensive to manufacture?
Coaxial
Twisted pair cable
Plastic
Fibre optic
Which network topology cannot use WiFi technology?
Mesh
Star
Partial Mesh
Every topology can use WiFi
I don't have a server in my network. What type of network is this?
Mesh
Star
Client-Server
Peer-2-Peer (P2P)
What is a WAN?
Network which uses 3rd party connections.
Network which covers a large geographical area, typically over 1 mile.
Network which uses our own connections
Networks covering small geographical areas, normally under 1 mile.
Network which operates on a singe site.
"A central backing store is available to all computers" is a feature of which usage model?
Client server
Peer-to-peer
LAN
WAN
Choose all that are true about star networks
All devices have a connection to a central switch or server
They are the most fault tolerant type of network
If one connection fails, only that one device is affected
They can be expensive because of the large amount of cabling needed
A global network connecting millions of computers.
Internet
World wide web
Cloud
ISP
A type of network model where all computers on the network share responsibility and there is no one central server.
Peer to peer
Client-server
Mesh
Virtual network
A set of protocols used in a wired local area network that describes how data is transmitted within it.
Ethernet
Wi-fi
Transport
TCP/IP
Which of these statements is true?
A client-server network has a central computer that provides services to the rest of the network
A client-server network is cheap and easy to set up
A client-server network cannot be used to share files
Each computer on a client-server network is maintain separately
Which of these is the correct definition of a router?
Forwards data packets along a network
Corrects errors that are found in data packets
A type of transmission media that provides the greatest bandwidth
A server within a network
Which one of these items is a disadvantage of a client-server network?
A central point of failure
Identify the disadvantages of using cloud storage
Need a constant internet connection
Reliant on the security of a third-party
You need to hire specialist staff
Reliant on third party to make backups
Data stored in the cloud can be vulnerable to hacking
Identify the advantages of using cloud storage
Saves spending money on a local server
Easy to increase the amount of storage
You can access your data from any location with an internet connection
Cloud storage makes automatic backups
It is impossible to hack into cloud storage
You need a (a) to transmit data between at least two different networks.
To allow your network to access the internet it requires a (a)
A school wants to connect to another school 5 miles away. What transmission media should they use?
WiFI
Bluetooth
Ethernet (Copper)
Fibre Optic
A school wants to connect 30 desktop PCs together. What transmission media should they use?
WiFI
Bluetooth
Ethernet (Copper)
Fibre Optic
B (a) is the amount of data that can be transmitted in a give period of time
"A division of network functionality" is the definition of a (a)
Why do some protocols have layers?
Each layer is (a) meaning that one layer can be (b) without affecting the others. A (c) can focus on one (d) at a time.
Organise these under the correct protocol.
Accessing a schools public website
Accessing you personal bank account details
Uploading documents to a webserver
Checking for new emails in your inbox
Why does the number of devices using a network affect the performance of the network?
More devices means more (a) is being transmitted at a time, (b) will be split between all devices which means less for each (c) . Devices will have to wait (d) before they can transmit and will have increased (e)
Complete the description of accessing websites.
A website is hosted on a (a) . The computers that access the websites are called (b) . The user enters the (c) into a web browser, The web browser sends a request to the (d) for the matching IP (Internet Protocol) address, If found the IP address is returned. A request is then sent to this IP address.
An IPv4 address is made of 4 groups of digits, Each group can be between the denary values (a) and (b) . The groups of digits are separated by a (c) .
Why is ethernet a standard?
Since ethernet is a standard it allows (a) with other devices, and is used in (b) devices. Ethernet provides a (c) connection. It is also means that ethernet is low cost for (d) and requires less (e)
Identify whether the protocol is related to email, transferring files or accessing websites.
POP
SMTP
FTP
HTTPS
Identify the similarities and differences between a switch and a router.
Connect devices
receive data from the devices
transmit the data to its destination
uses MAC addresses
uses IPs
corrects nodes/computers
connects networks/Internet
stores the addresses of devices attached…
has to look for correct address before sending
Draw connections to show one way that the devices could be connected using a mesh topology.
Identify the difference between a LAN and a WAN.
small geographical area
over a large geographical area
(usually) has own/dedicated infrastructure
uses external/shared infrastructure
A university has buildings in two sites that are 5 miles apart.
Site A has 4 classrooms. Site B has 2 classrooms. The network on each site between the classrooms is a star topology using a switch. The two sites are connected over the Internet.
Complete the network diagram for site A of the University
Organize these options into the right topology
Multiple routes exsists between different nodes
If a connection is broken you can still route traffic
In a full and wired verson there is a lot more cabling and hardware required
Has one central switch
All devices connect to the central switch
Traffic only goes where it's intended
If a single cable breaks it only affects this node
If switch breaks entire network stops working
What are the advantages and disadvantages of Cloud Storage
It can offer additional storage
It can efficiently backup
You can access data from anywhere
Cheaper as don't need own infrastructure
Requires an internet connection
Provides third party security
Reliant on third party for security but DPA
Someones authentication details could be obtained
Reorder the following for Domain Name System (DNS)
User enters a Uniform Resource Locator
The browser sends the request to the Domain Name Server
DNS looks for the matching IP address for the URL
If matching IP address is found then return to client
Client uses IP address to access websites
Roles of the following email protocols
Downloads the email from server and removes it from the server
Sending an email from one mail server to another
Downloading an email to you computer
Sending an email from a client to a mail server
Downloads a copy of an email from the server leaving the email on server
Please categorise the following address formats
255.56.163.94
49.240.172.209
1.1.0.1
256.202.174.120
340E:7048:8E78:522F:304D:423C:00AB:2C11
0520:F919:EABE:3A6D:CAEE:425A:DA41:C492
8DAD:2F14:3C01:B4B3:6DE8:C915:D94F
BE:DD:74:77:6F:BB
FF:E5:F1:44:F4:C6
CADE:907C:60F1
Organize these description under the correct form of addresing
Groups separated by colons
Groups separated by full stops
Values expressed in hex
4 groups of values
8 groups of values
6 groups of values
Groups of values are between 0 and 255
4 hex values in each group between 0000 and FFFF
2 hex values in each group between 00 and FF
32-bit address
128-bit address
48-bit address
Identify the advantages of a wired vs a wireless connection
Fast connection/speed
Secure // unlikely to have unauthorised access/hacked
Little interference // little chance of data loss // reliable
Long range transmission
Installation can be more complex
Users can be more mobile and portability
What are the advantages of star topology vs a mesh topology
Easier to add new nodes
Central device can monitor/control transmissions
Fewer data collisions
One connection/computer breaks the network still works
Easy to troubleshoot individual connections
Redundant connections increase reliability
Data can take multiple paths to reach the destination
Ideal for critical applications
Increased latency due to multiple paths
Identify the benefits and drawbacks of an office using a star topology instead of a mesh topology.
Easier to add new nodes
Central device can monitor/control transmissions
Faster data transmission
Fewer data collisions
One connection/computer breaks the network still works
Less cost of cables
Switch fails the network fails
Extra cost of central device/switch
Describe what is meant by a mesh topology, means all devices are (a) to one or (b) devices. No need for (c) management, with (d) paths between devices.
Higher Bandwidth means (a) network (b) of data, as (c) data is transferred (d)
More users accessing the network at the same time results in (a) network performance, as (b) data is transferred (c)
