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N#1 Flashcards

1
Q

Which two companies developed the internet and common standards and protocols?

A

Internet Assigned Number Authority and Internet Engineering Task

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2
Q

node

A

any device connected to a network

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3
Q

packet

A

A chunk of data sent over a network. Larger messages are divided into packets that may arrive at the destination in order, out-of-order, or not at all. Used in the Data Link layer.

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4
Q

application layer

A

used for providing an interface for software programs and exchanges data with network hosts that have already established a communications channel. HTTP, FTP, DNS, and POP3 protocols are used.

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5
Q

presentation layer

A

Used for character set conversions and transforms information between the two formats from network to application. Supports data compression and encryption.

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6
Q

session layer

A

Responsible for establishing a connection between network devices, maintaining the connection, and then terminating or reestablishing it when required.

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7
Q

Transport layer

A

identifies each type of network application by using a port number. Data from the layers above are packaged as a series of 4 segments. Segments are then tagged and sent to the network layer. Any lost or damaged packets are resent. Uses TCP and UDP.

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8
Q

Network layer

A

Moves data around the internet by using logical networks and host ID’s. Packets are forwarded router to router to the target network, and then delivers the packet to target node. Uses the TCPIP protocol.

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9
Q

data link layer

A

Communicating data between nodes occurring at the same segment. All nodes can send traffic to each other even despite not having used the same media. It can forward data using hardware addresses within a single segment. Arranges the bits from the physical layer into frames.

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10
Q

Wireless access point

A

enables devices to connect to a wireless network to communicate with each other

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11
Q

physical layer

A

Transmission, and signals from one node to another occurs. It can be cabled or wireless. Protocols are not the main focus, and devices like hubs, media connectors, modems, transceivers, and repeaters are used.

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12
Q

media connectors

A

Converts any wired network enabled device with available Ethernet port to the latest wireless technology.

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13
Q

LAN port

A

Used to connect the internet with the computer.

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14
Q

radio antennas

A

used to receive and transmit wireless signals.

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15
Q

What layer is UDP and TCP in?

A

Transport layer

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16
Q

MAC address

A

Forwards transmission to hosts

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17
Q

Segment

A
  • Improves access control for network security
  • Reduces attack plane
  • Improved performance with less network traffic
    Portion of computer network
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18
Q

host

A

any device connected to a network needing an IP address.

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19
Q

frame

A

transmission unit of the network layer. Holds more info than a packet.

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20
Q

encapsulation

A

How data is packed and transferred from one computer to another. Router sends packets inside frames.

21
Q

bit

A

single unit of data in a computer, typically represented as a 0 or 1.

22
Q

byte

A

A group of eight bits.

23
Q

decapsulation

A

Receiving data is the opposite of encapsulation, from the physical layer to decoding. Unpacks data.

24
Q

Encapsulation order

A

Physical - Application

25
Q

Decapsulation order

A

Application - physical

26
Q

Encoding

A

Translates digital data to data that can be understandable to people.

27
Q

Hub

A

can enhance an electronic signal, but can handle multiple nodes at once. It is in the center

28
Q

modem

A

a device that can translate original data into waves or translate waves to data

29
Q

bridge

A

multiple ports which link every physical network connected and reducing the amount of performance when joining all the nodes.

30
Q

UDP

A

A protocol for sending packets quickly with minimal error-checking and no resending of dropped packets, In the transport layer.

31
Q

TCP

A

A protocol for sending packets that does error-checking to ensure all packets are received and properly ordered, In the transport layer.

32
Q

How do packets traverse different networks?

A

The packet is forwarded through routers and the internetwork to the target network.

33
Q

Transport layer is also known as

A

Host to Host or End to End

34
Q

TCP and UDP functions

A

The UDP uses connection-oriented transmission and is faster than TCP due to the lack of feedback if data has transferred. TCP provides feedback and load data can be retransmitted.

35
Q

Stop, start, data communication

A

The session layer.

36
Q

LAN

A

Connects a group of computers in close proximity, such as in an office building, school, or home

37
Q

SOHO

A

A small network that can comprise up to 10 nodes.

38
Q

WAN

A

A network that connects devices in geographically separated areas.

39
Q

Ethernet switch

A

A network component that receives incoming frames, stores them temporarily, and sends them back out to another port.

40
Q

Private Network

A

A network whose access is restricted to only clients or machines with proper credentials.

41
Q

Public internet

A

publicly accessible system of networks that connects computers around the world

42
Q

how can each byte or octet be expressed?

A

2 hex digits

43
Q

SOHO

A

Category of LAN with a small number of computing hosts that typically rely on a single integrated appliance for local and internet connectivity.

44
Q

DHCP

A

assigns the IP to WAN

45
Q

Firewall

A

prevents a host from accessing LAN servers without authorization.

46
Q

International Organization for Standardization (ISO)

A

Created OSI

47
Q

Open Systems Interconnection model (OSI)

A

A model used to define how data communication occurs on computer networks.

48
Q

Tranceiver

A

Part of a network interface that sends and receives signals over the network media.

49
Q

IP address

A

Identifier of your device on network.

N#1 (1 decks)

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