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COMPUTER SCIENCE > NETWORKS - LANS > Flashcards

NETWORKS - LANS Flashcards

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1
Q

What is CSMA/CD?

A

Carrier Sense Multiple Access with Collision Detection, a protocol used in Ethernet networks to manage data transmission and avoid collisions.

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2
Q

What is a NIC?

A

Network Interface Card, a hardware component that allows computers to connect to a network and transmit data

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3
Q

What is a MAC Address?

A

A 48-bit globally unique identifier assigned to network interface cards, written in hexadecimal (e.g., 00:60:8C:00:54:99)

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4
Q

What are the three types of LAN transmissions?

A

Unicast (single destination), Multicast (multiple but not all destinations), and Broadcast (all destinations)

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5
Q

What is the difference between a hub and a switch?

A

A hub broadcasts data to all connected devices, while a switch selectively forwards data only to the intended recipient

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6
Q

What is Switched Ethernet?

A

A hardware implementation of bridging that automatically learns source addresses and forwards selectively to destinations

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7
Q

What are VLANs?

A

Virtual LANs are software-defined logical groupings that limit broadcast traffic to defined workgroups.

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8
Q

What is PoE?

A

Power over Ethernet, a technology that delivers power through Ethernet cabling to devices like VoIP phones and wireless access points

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9
Q

What are the two sub-layers of the data link layer defined by IEEE?

A

Logical Link Control (LLC) and Media Access Control (MAC)

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10
Q

What are three common aspects of IEEE 802 LAN standards?

A

48-bit MAC address length, support for broadcast and multicast addressing, and 32-bit error checking

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11
Q

How has Ethernet evolved in terms of speed?

A

From 10BASE5 (10 Mbps) to higher speeds like 1 Gigabit/s, 10 Gigabit/s, and even 100 Gigabit/s Ethernet

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12
Q

What is the main difference between legacy and contemporary Ethernet?

A

Contemporary Ethernet (1 Gbps and above) uses full-duplex communication and has eliminated CSMA/CD

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13
Q

What is meant by IEEE (802.3)?

A

The working group and standard defining the physical layer and data link layer’s MAC of wired Ethernet

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14
Q

What is the definition of LAN (Local Access Area)?

A

A computer network that interconnects computers within a limited area

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15
Q

What is the definition of MAC Address?

A

A unique identifier assigned to network interface controllers for communications on a network segment

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16
Q

What is the definition of NIC (Network Interface Card)?

A

Hardware component that allows computers to connect to a network

17
Q

What is meant by CSMA/CD?

A

Carrier Sense Multiple Access with Collision Detection, a media access control method used in early Ethernet technology

18
Q

What is the definition of a Hub?

A

A basic networking device that broadcasts data to all connected devices

18
Q

What is the definition of a Switch?

A

A networking device that selectively forwards data to specific connected devices

19
Q

What is the definition of a Router?

A

A networking device that forwards data packets between computer networks

20
Q

What is the definition of Unicast?

A

A one-to-one transmission from a single sender to a single receiver

21
Q

What is the definition of Multicast?

A

A one-to-many transmission from a single sender to multiple receivers

22
Q

What is the definition of Broadcast?

A

A one-to-all transmission from a single sender to all devices on the network

23
Q

What is the definition of VLAN (Virtual LAN)?

A

A logical grouping of network devices that allows control of how broadcast traffic flows

24
Q

What is the definition of Ethernet?

A

A family of computer networking technologies commonly used in LANs

25
Q

What is the definition of PoE (Power over Ethernet)?

A

A technology that allows electrical power to be carried by Ethernet cables

26
Q

What is the definition of Full-Duplex

A

A communication mode where data can be transmitted in both directions simultaneously

COMPUTER SCIENCE (1 decks)

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