Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

cs > week 5 local area networks > Flashcards

week 5 local area networks Flashcards

1
Q

What is CSMA/CD?

A

CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is a protocol used to manage how devices share a communication medium (like Ethernet) to prevent data collisions.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the main concept behind CSMA/CD?

A

CSMA/CD: Devices listen to the network before transmitting, and if a collision is detected during transmission, both devices stop and wait a random time before retransmitting.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a Network Interface Card (NIC)?

A

A NIC is a hardware component that connects a device to a network and handles sending/receiving data packets.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is a MAC address?

A

A MAC address is a unique 48-bit identifier assigned to a NIC, written in hexadecimal format (e.g., 00:60:8C:00:54:99).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the key differences between Hubs and Switches?

A

Hubs broadcast data to all devices and cause more collisions, while switches send data to the intended recipient, reducing collisions.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the types of Ethernet transmission?

A

Types of Ethernet transmission:

Unicast (one-to-one)
Multicast (one-to-many)
Broadcast (one-to-all)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the role of the Data Link Layer in networking?

A

The Data Link Layer is responsible for framing, error detection, and MAC addressing.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the IEEE 802.3 standard?

A

IEEE 802.3 is the standard for Ethernet.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is a Virtual LAN (VLAN)?

A

A VLAN is a software-defined network that groups devices logically, regardless of their physical location, improving network performance and security.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is Power over Ethernet (PoE)?

A

Power over Ethernet (PoE) is a technology that allows Ethernet cables to deliver both power and data to devices like wireless access points, IP phones, and security cameras.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the difference between Shared Media and Switched Media?

A

Shared Media means all devices share the same medium, leading to collisions. Switched Media provides dedicated paths for devices, reducing collisions.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is a Collision Domain?

A

A Collision Domain is a network segment where data packets can collide if two devices transmit at the same time. Switches reduce collision domains by isolating traffic.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is a Broadcast Domain?

A

A Broadcast Domain is a network segment where a broadcast packet is forwarded to all devices. Routers separate broadcast domains to reduce unnecessary traffic.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the two types of addresses used in networking?

A

MAC Address (Layer 2) is used within the local network, and IP Address (Layer 3) is used across different networks.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is Unicast?

A

Unicast is a one-to-one communication, where data is sent to a specific device on the network.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is Multicast?

A

Multicast is one-to-many communication, where data is sent to a group of devices, but not all devices on the network.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is Broadcast?

A

Broadcast is one-to-all communication, where data is sent to all devices within a broadcast domain.

17
Q

How does CSMA/CD work in detail?

A

CSMA/CD: A device listens to the network to check if it’s free. If free, it starts transmitting; if a collision occurs, both devices stop, wait for a random backoff time, and retransmit.

18
Q

What are the benefits of VLANs?

A

VLANs reduce broadcast traffic, increase security, and provide network flexibility by logically grouping devices, regardless of physical location.

19
Q

What are the two sub-layers of the Data Link Layer?

A

Logical Link Control (LLC): Manages flow control and error checking.
Media Access Control (MAC): Handles addressing and controls access to the physical medium.

20
Q

What is the standard for Power over Ethernet (PoE)?

A

The standard for Power over Ethernet (PoE) is defined in IEEE 802.3af.

21
Q

What are the two main types of NICs?

A
  1. Wired NIC: Connects to the network using Ethernet cables.
  2. Wireless NIC: Connects to the network using Wi-Fi.
22
Q

What are the two parts of a MAC address?

A

First 24 bits: Organisationally Unique Identifier (OUI), assigned by the IEEE.
Last 24 bits: Device-specific identifier assigned by the manufacturer.

23
Q

How can you find a MAC address on a computer?

A

Windows: ipconfig /all
Linux/Mac: ifconfig

24
Q

What is an example of a broadcast transmission?

A

ARP (Address Resolution Protocol) requests use broadcasts to find MAC addresses on a network.

25
Q

What are the two sub-layers of the Data Link Layer?

A

Logical Link Control (LLC): Manages flow control and error checking.
Media Access Control (MAC): Handles addressing and controls access to the transmission medium.

26
Q

What are the different ways to group devices into VLANs?

A

By switch ports.
By MAC addresses.
By Layer 3 protocol types (e.g., IP).

27
Q

What devices commonly use Power over Ethernet (PoE)?

A

Wireless Access Points (WAPs).
IP phones.
Security cameras.

28
Q

What is the main purpose of VLANs?

A

VLANs reduce broadcast traffic, improve network security, and provide flexibility in network configuration.

29
Q

What is the standard that defines Power over Ethernet (PoE)?

A

IEEE 802.3af.

30
Q

What is an example of a shared media network device?

A

Hubs are an example of shared media network devices.

31
Q

What is an example of a switched media network device?

A

Switches are an example of switched media network devices.

32
Q

How do switches reduce collision domains?

A

Switches isolate traffic between ports, creating separate collision domains for each port

33
Q

How do routers reduce broadcast domains?

A

Routers separate broadcast domains, preventing broadcast packets from being sent to all devices on the network.

34
Q

What are the three types of data transmission on a network?

A

Unicast: One-to-one communication.
Multicast: One-to-many communication.
Broadcast: One-to-all communication within a broadcast domain.

35
Q

What does the IEEE 802.11 standard refer to?

A

The IEEE 802.11 standard refers to Wi-Fi.

36
Q

What does the IEEE 802.1Q standard refer to?

A

The IEEE 802.1Q standard refers to VLANs.

37
Q

What are standards?

A

Rules set by organisations like IEEE to ensure devices from different manufacturers can work together on a network.

38
Q

What is a medium in networking?

A

A medium is the physical path through which data travels, like cables (wired) or radio waves (wireless).

39
Q

Why are collisions bad

A

Wasted Bandwidth: Collisions cause data to be retransmitted, using up more bandwidth.

Delays in Data Transfer: Devices must wait a random amount of time before trying to send data again (backoff time), slowing down the network.

Higher Collision Rate = Lower Network Performance: If too many collisions occur, the network slows down significantly.

cs (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions