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Prelims (3rd Yr - 1st sem) > ITEC54 (Sir Anda) > Flashcards

ITEC54 (Sir Anda) Flashcards

1
Q
  • they constitute the Link layer, the Internetwork
    layer, and the Transport layer respectively.
  • corresponds strongly to the idea of a
    programming interface or library, with the
    understanding that a given layer communicates
    directly only with the two layers immediately
    above and below it.
A

Layers

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2
Q

Internet five-layer Model

A
  1. Application Layer
  2. Transport Layer
  3. Internet Layer
  4. Link Layer
  5. Physical Layer
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3
Q
  • the rate at which bits are transmitted
  • the speed at which data is transferred within the computer or between a peripheral device and the computer, measured in bytes per second
A

Data Rate

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4
Q

is the amount of data moved successfully from one place to another in a given time period, and typically measured in bits per second (bps), as in megabits per second (Mbps) or gigabits per second (Gbps)

A

Throughput

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5
Q

refers to the theoretical rate of speed that data on your network can travel, which is probably a speed you won’t see very often.

A

Bandwidth

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6
Q
  • are modest-buffers of data, transmitted as a unit through some shared of links
  • cutting data into small chunks
  • is collection of data that can be used by computers which need to communicate with each other, usually part of a network
A

PACKETS

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7
Q

contains instructions about the data carried by the packet

A

Header

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8
Q
  • the actual data
  • the only data received by the destination system.
A

Payload

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9
Q

sometimes called the footer, typically contains a couple of bits that tell the receiving device that it has reached the end of the packet. It may also have some type of error checking.

A

Trailer

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10
Q
  • is the arrangement with which computer systems or network devices are connected to each other
  • can be used to define or describe the arrangement of various types of telecommunication networks, including command and control radio networks, industrial field busses and computer networks
A

Topology

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11
Q
  • a set of entries in the forwarding tables that cause some packets to circulate endlessly
  • is a serious network problem which happens when a data packet is continually routed through the same routers over and over
A

Routing Loops

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12
Q
  • is the reduced quality of service that occurs when a network node or link is carrying more data that it can handle.
  • typical effects include queueing delay, packet loss or the blocking of new connections
A

Congestion

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13
Q

Causes of Congestion

A
  • Too many hosts in broadcast domain
  • Broadcast Storm
  • Low Bandwidth
  • Adding retransmitting hubs
  • Multicasting
  • Outdated Hardware
  • Bad Configuration Management
  • Rogue Adapter Broadcast
  • Artificial Congestion
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14
Q
  • is a communication protocol for LAN using same media interfaces (mainly RJ45 or fiber)
  • is a local are network access technology. So any cable that enables connection with a system/device, within a LAN, you can name it “ethernet cable” or “network cable”
A

Ethernet

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15
Q
  • are independent networks but may be linked within a WAN through internet devices such as Routers.
  • there is a no difference in network and ethernet cables. Network cables comprises of ethernet and LAN cable.
A

LAN

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16
Q
  • is the principle communications protocol in the Internet protocol suite for relaying datagrams across network boundaries
  • its routing function enables internetworking, and essentially establishes the internet.
A

Internet Protocol (IP)

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17
Q
  • provides a global mechanism for addressing and routing, so that packets can actually be delivered from any host to any other host.
A

Internet Protocol (IP)

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18
Q
  • The entire suite ius commonly reffered to as ____
  • originated in the initial network implementation in which it complemented the Internet Protocol (IP)
A

Transmission Control Protocol (TCP)

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19
Q
  • is a hierarchical and decentralized naming system for computers, services, or other resources connected to the internet or a private network.
  • is the phonebook of the internet
A

Domain Name System (DNS)

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20
Q
  • is a system designed to prevent unauthorized access to or from a private network.
  • is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
  • establishes a barrier between a trusted networks and a untrusted network, such as the internet.
A

Firewall

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21
Q

is useful to determine if another machine is accessible

A

ping

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22
Q
  • is a way of connecting computers together in a local are network or LAN
  • it has been the most widely used method if linking computers together in LAN’s since the 1990s
  • a system for connecting a number of computer systems to form a local area network, with protocols to control the passing of information and to avoid simultaneous transmission by two or more systems
  • original was the 1976 paper of metcalfe and boggs.
A

Ethernet

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23
Q
  • the only active components besides the stations
  • originally intended simply to make end to end joins between cable segments
A

repeaters

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24
Q
  • is an electronic device that receives a signal and retransmit it.
  • are used to extend transmissions so that the signal can cover longer distances or be received on the other side of an obstruction.
A

Repeater

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25
Q
  • is networking hardware that connects devices on a computer network by using packet switching to receive and forward data to the destination device.
  • is a multiport network bridge that uses MAC addresses to forward data at the data link layer of the OSI model
A

Switches

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26
Q

an aggregation of physical ethernets connected by switches

A

virual

27
Q

In the telecom world, a repeater might be called a _____

A

Digital regenerator

28
Q
  • a repeater with more than two port was commonly called ___
A

Hub

29
Q
  • reads in and forward an entire packet a unit, and the destination address is consulted to determine to where the packet is forwarded
A

Bridges/Switches

29
Q

allowed branching and thus much more complex topologies

  • is commonly used to connect segments of a LAN. It contains multiple ports
  • act as a common connection point for devices in a network
A

hub

30
Q
  • used to transmit to a set of station; streaming video
A

Ethernet multicast

31
Q

The set of subscriber to a given multicast address

A

Multicast Group

32
Q

Ethernet packets contain a 32-bit CRC (Cyclical Redundancy Check) error- detecting code to detect bit errors

A

Errors

33
Q
  • also introduced the concept of full-duplex Ethernet: two twisted pairs could be used, one for each direction.
  • is limited to paths not involving hubs, that is, to single station-to station links, where a station is either a host or a switch.
  • doe snot particularly support links between buildings
A

100-Mbps(Fast) Ethernet

34
Q

has two or more Ethernet interfaces

A

switch

35
Q
  • are usually used to connect points on a company’s internal LAN
  • it is also known as a data switch or an ethernet switch.
A

LAN Switch

36
Q
  • blocks the overlap of data packets running through a network by the economical allocation of bandwidth
  • delivers the transmitted data packet before directing it to its planned receiver
A

LAN Switch

37
Q
  • reduce network congestion or bottlenecks by distributing a package of data only to its intended recipient
  • creates a series of instant networks that contain only the two devices communicating with each other at that particular moment
A

LAN Switch

38
Q
  • are frequently used in home networks, small companies and businesses.
  • it permits devices on the network to connect with each other, such as computer or printer to computer in one location
A

Unmanage Switch

39
Q
  • does not necessarily need to be configured or watched.
  • it is simple and easy to set up. If you want to add more ethernet ports, you can use these plug and play types of switches in networking.
A

Unmanage Switch

40
Q

they can be customized to enhance the functionality of a certain network.

  • They offer some features like QoS (Quality of Service), Simple Network Management Protocol (SNMP) and so on.
A

Manage Switch

41
Q
  • is a network switch that utilizes Power over Ethernet technology.
  • can support power and data transmission over one network cable at the same time.
A

PoE Switch

42
Q

provide a way to simplify and increase the availability of the network.

A

Stackable Switch

43
Q

it supports creation of virtual links that join far-flung nodes via the internet

  • is any broadcast domain that is partitioned and isolated in computer network
A

Virtual Lan

44
Q
  • gives you online privacy and anonymity by creating a private network from a public internet connection
  • is a private network that encrypts and transmits data while it travels from one place to another on the internet.
A

Virtual Private Network (VPN)

45
Q

is the process of encrypting data and keeping it separate from other traffic on the internet

A

Tunneling

46
Q
  • is a network architecture approach that enables the network to intelligently and centrally controlled, or ‘programmed’, using software applications
  • this helps operators manage the entire network consistently and holistically, regardless of the underlying network technology.
A

Software Defined Networking (SDN)

47
Q

is a leased line point-to-point link between two sites, where the subscriber interface at each end of the line looks like ethernet.

  • is a marketing term for extensions to Ethernet to enable telecommunications network providers to provide Ethernet services to customers and to utilize Ethernet technology in their networks.
A

Carrier Ethernet

48
Q
  • is a communication protocol in a local area network (LAN) where all stations are connected in a ring topology and pass one or more tokens for channel acquisition
  • is a computer networking technology used to build LAN
  • it uses special 3-bytes frame called a token
A

Token Ring

49
Q
  • is a means of transporting data over a packet-switched network
  • is a logical path between nodes in a network
A

Virtual Circuits

50
Q

Types of Virtual Circuits

A

Permanent Virtual Circuits (PVC)
Switched Virtual Circuits (SVC)

51
Q

are set up manually by the communication management station

  • are always on and are generally used for high-speed connectivity
A

Permanent Virtual Circuit (PVC)

52
Q

are set up automatically when a communication session is established

-used in WAN
-freed up

A

Switched Virtual Circuits (SVC)

53
Q

is a network mechanism intended to accommodate real-time traffic as well as bulk data transfer

  • is a telecommunications standard defined by ANSI and ITU
  • splits the data
A

Asynchronous Transfer Mode (ATM)

54
Q

uses a radio frequency signal instead of wires to connect your devices

  • is the name of a wireless networking technology that uses radio waves
A

WIFI (Wireless Fidelity)

55
Q

is to broadcast a wireless signal that computers can detect and “tune” into.

A

Access Pont (AP)

56
Q

the organization that owns the WI-FI

A

WIFI Alliance

57
Q

original name is WirelessMAN (for metropolitan are network)

  • is a family of wireless broadband communication standards
  • uses spectrum
  • used to provide internet services such as mobile data and hotspots
A

WiMax (Worldwide Interoperability for Microwave Access)

58
Q
  • ITU approved 4G
  • more of a successor to current mobile 3G standards than WiMax
A

LTE (Long Term Evolution)

59
Q

is the operation of wireless communication devices or systems used to connect two fixed locations

  • uses radio waves transmitted by a cell tower to bring you your internet connection
A

Fixed Wireless

60
Q

involves direct (nonsatellite) radio communication between subscribers and a central access point

-Access point are usually tower-mounted and serve multiple subscribers, though single-subscriber point-to-point “microwave links” also exist

A

Terrestrial Wireless

61
Q
  • is the ability to transmit and receive data from a relatively small satellite dish on Earth
  • satellite dish
  • a wireless connection that involves 3 satellite dishes
A

Satellite Internet

62
Q
A

Prelims (3rd Yr - 1st sem) (4 decks)

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