1
2 marks
Protocols are used to transmit data through the network and over the internet.
Identify one protocol that can be used to perform each of the following tasks:
Send an email
Access a website securely
Was this exam question helpful?
Wired & Wireless Networks, Protocols & Layers (OCR GCSE Computer Science): Exam Questions
Exam code: J277
2 hours35 questions
2
1 mark
The owners of a large bakery have a Local Area Network (LAN) with a star topology. They order their supplies over the Internet.
When data is transmitted from the bakery to the supplier, network protocols are used.
Define what is meant by a ‘network protocol’.
Was this exam question helpful?
3
4 marks
Data transmitted over the network uses different protocols.
Tick one box in each row to identify whether the protocol is related to email, transferring files or accessing websites.
Protocol | Transferring files | Accessing websites | |
|---|---|---|---|
POP | |||
FTP | |||
SMTP | |||
HTTPS |
Was this exam question helpful?
4
4 marks
TCP/IP is one example of a protocol.
Give the name of one appropriate protocol for each task in the table.
Task | Protocol for this task |
|---|---|
Sending an email from one mail server to another | |
Transmitting a file from a client to a server | |
Viewing a website using a web browser | |
Downloading an email to your computer |
Was this exam question helpful?
5
5 marks
The following table has descriptions of Ethernet and WiFi.
Tick (✓) one box in each row to identify if the description is more appropriate for Ethernet or WiFi.
Description | Ethernet | WiFi |
|---|---|---|
A wired connection | ||
More likely to be affected by interference | ||
Data can be transmitted at a faster speed | ||
Wireless transmission | ||
Shorter transmission range before data is lost |
Was this exam question helpful?
6
1 mark
State what the acronym TCP/IP stands for
Was this exam question helpful?
7
1 mark
Identify whether TCP/IP is a single protocol or a stack of protocols
Was this exam question helpful?
8
1 mark
Identify one difference between a Full Mesh and a Partial Mesh topology
Was this exam question helpful?
9
1 mark
State which address is permanent and cannot be changed on a device’s Network Interface Controller (NIC)
Was this exam question helpful?
10
1 mark
Identify the number based used for a MAC address
Was this exam question helpful?
11
1 mark
Define the term 'layer' as used in computer networking
Was this exam question helpful?
12
1 mark
Identify one benefit of using a layered approach when teaching networking
Was this exam question helpful?
1
7 marks
Users can access websites from library computers.
Complete the description of accessing websites using the given list of terms.
Not all terms will be used.
'0' ' 1' '127' '128' '255' ' 256' ' Colon'
'Domain Name Server' 'Embedded systems' 'File server'
'Full stop' 'Hyphen' 'Internet protocol' 'MAC address'
'Router' 'Uniform Resource Locator' 'Web server' 'Clients'
A website is hosted on a ...................... The computers that access the websites are called .................... . The user enters the .......................................... into a web browser. The web browser sends a request to the ............................. 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 ..... and ..... . The groups of digits are separated by a ............... . |
|---|
Was this exam question helpful?
2
2 marks
A library does not use encryption when data is transmitted through the network.
Give two reasons why the library should use encryption.
Was this exam question helpful?
3a
2 marks
The network has one wireless access point in the kitchen that transmits data on the 5GHz frequency.
When the laptop is in the kitchen, it has better network performance.
Explain why the laptop’s network performance is lower in the bedroom.
3b
2 marks
State two ways Hope could improve the wireless network performance in the bedroom.
1 | |
|---|---|
2 |
Was this exam question helpful?
4
4 marks
Ethernet cables are used within the office building.
Tick one box in each row to identify if the statement about Ethernet is True or False.
Statement | True | False |
|---|---|---|
Ethernet is a protocol | ||
Ethernet uses wireless data transmission | ||
Ethernet can transmit data at speeds of up to 100Gbits per second | ||
Ethernet is a protocol within the TCP/IP stack |
Was this exam question helpful?
5
2 marks
Computers access the Internet using the TCP/IP model.
The TCP/IP model uses layers including the application layer and transport layer.
Explain why the TCP/IP model uses layers.
Was this exam question helpful?
6a
2 marks
For the scenario below, identify the most appropriate protocol to be used and explain the function of the protocol.
A user wants to transfer a file directly from his computer to his friend’s computer. |
|---|
6b
2 marks
For the scenario below, identify the most appropriate protocol to be used and explain the function of the protocol.
A customer wants to securely log into her bank’s website to check her account balance. |
|---|
Was this exam question helpful?
7a
2 marks
An airport has computers that are connected together on a Local Area Network (LAN).
Each computer has an IP address and a MAC address.
Give one valid example of an IPv4 address and one valid example of an IPv6 address.
7b
2 marks
Describe the format of a MAC address.
Was this exam question helpful?
8a
4 marks
The airport currently has wired connections in their Local Area Network.
Describe two benefits to the airport of using wired connections in their network.
8b
3 marks
Explain the reasons why the airport should also allow the network to be accessed using a wireless connection.
Was this exam question helpful?
9
2 marks
Describe the purpose of the TCP/IP model in a network
Was this exam question helpful?
10
2 marks
Explain why the TCP/IP model uses layers
Was this exam question helpful?
11
2 marks
Explain one advantage of using a Mesh topology in a military communication system
Was this exam question helpful?
12
2 marks
Describe one disadvantage of implementing a Full Mesh network in a large office
Was this exam question helpful?
13
2 marks
Explain the difference in the purpose of an IP address versus a MAC address
Was this exam question helpful?
14
2 marks
Describe how layers promote interoperability between different hardware vendors
Was this exam question helpful?
1
2 marks
The wired connection is an Ethernet connection.
Ethernet is considered a standard.
Explain why Ethernet is a standard.
Was this exam question helpful?
2a
1 mark
TCP/IP is a set of protocols based on layers.
With regards to network protocols, define what is meant by a ‘layer’.
2b
2 marks
Describe one advantage of using layers to construct network protocols.
Was this exam question helpful?
3
2 marks
Explain the difference between how the IMAP (Internet message access protocol) and SMTP (simple mail transfer protocol) protocols are used.
Was this exam question helpful?
4
4 marks
"A file is sent from an office in London to a client in New York."
Analyse the role of the TCP/IP stack in ensuring the data arrives reliably
Was this exam question helpful?
5
3 marks
Evaluate the benefit of the TCP/IP model being a standard rather than a proprietary system.
Was this exam question helpful?
6
4 marks
Compare the performance of a Mesh topology and a Star topology when the central switch fails
Was this exam question helpful?
7
3 marks
A city-wide emergency sensor network uses a wireless Mesh.
Justify this choice over a Star topology
Was this exam question helpful?
8
3 marks
"A router receives a data packet from the internet."
Describe how the router uses both IP and MAC addresses to deliver the packet to the correct laptop in a house
Was this exam question helpful?
9
3 marks
"A network administrator is configuring a new laptop to connect to the company network."
Describe the format of a MAC address and how it is used to identify devices on a local network.
Was this exam question helpful?