Networks (7.2)

Question 1

(Networks L1 Networks Basics) - State the Advantages of using a Network

Answer 1

Enhances availability of resources and information, Makes File sharing easier, Betters ease of communication, High potential for growth, Increases cost efficiently, Expands storage capacity

Question 2

(Networks L1 Networks Basics) - State the Disadvantages of using a Network

Answer 2

Lack of independence, Potential for security breaches, Central point of failure,
Fasten propagation of Malware, High levels of Skill needed to manage, Expensive to set up

Question 3

(Networks L1 Networks Basics) - Define the term ‘Network Resource’ in the context of IT

Answer 3

A ‘Network Resource’ refers to elements of Hardware, Software or Data that is related to networks (e.g. NAS Drives, Servers and Printers)

Question 4

(Networks L1 Networks Basics) - Define the term ‘Capacity’ in the context of IT

Question 5

(Networks L1 Networks Basics) - Define the term ‘Scalable’ in the context of IT

Question 6

(Networks L1 Networks Basics) - Define the term ‘Connection’ in the context of IT

Question 7

(Networks L1 Networks Basics) - Define the term ‘Network Interface’ in the context of IT

Question 8

(Networks L1 Networks Basics) - Define the term ‘Packet’ in the context of IT

Question 9

(Networks L1 Networks Basics) - Define the term ‘Protocol’ in the context of IT

Question 10

(Networks L2 Wireless Networks) - How does a Wireless device connect to the internet through via a LAN?

Answer 10

The device sends and revives Data through Radio Waves (WiFi) to the Router which has a Wired connection to the desired Server via Network Backbone Cables (the wider Internet).

Question 11

(Networks L2 Wireless Networks) - State the Advantages of Wireless Networking

Answer 11

Increased Mobility, Simplicity of Installation, Wider Network reach, More Network Flexibility, Reduced Cost (over time), Increased Scalability

Question 12

(Networks L2 Wireless Networks) - State the Disadvantages of Wireless Networking

Answer 12

Setup can be Difficult, Increased Risk of Unauthorised Access, Significantly Slower than Wired Connections, Network Stability Issues are more common (due to distance and Interference)

Question 13

(Networks L2 Wireless Networks) - What does CSMA(CD / CA) Stand For?

Answer 13

Carrier Sense Multiple Access (Collision Detection / Collision Avoidance)

Question 14

(Networks L2.5 Wired Networks) - What is CSMA(CA)? and What is it’s purpose for?

Answer 14

CSMA(CA) is a Protocol often used in Wired Connections to Minimise the risk of a Data Collision prior to it, the Protocol works by alerting other Networks Users to Pause interacting before itself outputting traffic

Question 15

(Networks L2.5 Wired Networks) - What is CSMA(CD)? and What is it’s purpose for?

Answer 15

CSMA(CD) is a Protocol used in Wired Networks to Reduce the Recovery Time after a Data Collision, this is accomplished by Resending the Data Packet whenever a conflict occurs. It is also more Efficient than CSMA(CA)

Question 16

(Networks L3 Wired Networks) - Layers of a Coax Cable (Inner Layers to Outer)

Answer 16

Conducting core, Insulation, Braided shielding and an outer sheath.

Question 17

(Networks L3 Wired Networks) - State the order of colors used in ‘Straight Through’ Ethernet Cables

Answer 17

Striped Orange, Orange, Striped Green, Blue, Striped Blue, Green, Striped Brown, Brown

Question 18

(Networks L3 Wired Networks) - State 5 Benefits of Wired Connections

Answer 18

1. Speed - Data travels faster.
2. Security - Harder to access the network without permission.
3. Distance - The user can access the network from further away.
4. Costs - Simple cable configurations are cheaper than wireless ones (as they usually require specialist kit).
5. Less Interference - Wireless networks can be affected by nearby traffic.

Question 19

(Networks L10 Layer TCP/IP) - What is a TCP/IP Stack?

Answer 19

A TCP/IP stack consist of lots of individual protocols all working together to allow efficient communication

Question 20

(Networks L10 Layer TCP/IP) - What are the TCP/IP Stack Levels?

Answer 20

Application Layer, Transport Layer, Internet Layer and The Network Interface Layer

Question 21

(Networks L10 Layer TCP/IP) - What does the Application Layer do?

Answer 21

Application layer interacts with software applications to implement a communicating component. The interpretation of data by the application program is always outside the scope of the OSI model.

Question 22

(Networks L10 Layer TCP/IP) - What does the Transport Layer do?

Answer 22

It determines how much data should be sent where and at what rate. This layer builds on the message which are received from the application layer. It helps ensure that data units are delivered error-free and in sequence.

Question 23

(Networks L10 Layer TCP/IP) - What does the Internet Layer do?

Answer 23

The Internet layer offers the functional and procedural method for transferring variable length data sequences from one node to another with the help of various networks. They are responsible for Routing Protocols, Multicast Group Management, Network-Layer Address Assessment.

Question 24

(Networks L10 Layer TCP/IP) - What does the The Network Interface Layer do?

Answer 24

Network Interface Layer is this layer of the four-layer TCP/IP model. This layer is also called a network access layer. It helps you to defines details of how data should be sent using the network. It also includes how bits should optically be signalled by hardware devices which directly interfaces with a network medium, like coaxial, optical, coaxial, fibre, or twisted-pair cables.

Question 25

(Networks L10 Layer TCP/IP) -

Question 26

(Networks L11 Data Packets) - What is a Data packet?

Answer 26

A unit of data made into a single package that travels along a given network path. Data packets are used in Internet Protocol (IP) transmissions for data that navigates the Web, and in other kinds of networks.

Question 27

(Networks L11 Data Packets) -

Question 28

(Networks L0 7.2 Test) - Identify 3 ways to secure a wireless network

Question 29

(Networks L0 7.2 Test) - Describe the difference between CSMA (CD) and CSMA (CA)

Question 30

(Networks L0 7.2 Test) - What is the purpose of Shielding when used with STP Ethernet Cables?

Question 31

(Networks L0 7.2 Test) - Explain the term Latency

Question 32

(Networks L0 7.2 Test) - Describe the benefits of having a computer joined to a network rather than it being stand alone (4 Mark)

Question 33

(Networks L0 7.2 Test) - Outline the function of the Transport layer as identified in the OSI Model

Question 34

(Networks L0 7.2 Test) - Which two sub layers is the Data Link layer split into? What are their functions in computer communication?

Question 35

(Networks L0 7.2 Test) - Explain why a router is identified as a ‘Layer 3’ device

Question 36

(Networks L0 7.2 Test) - Why is TCP considered more reliable than UDP when transmitting data?