ITEC51 QUIZ 1(?)

Question 1

They constitute the link layer, the internetwork layer, and the transport layer respectively.

Answer 1

Layers

Question 2

Corresponds strongly to the idea of a programming interface or library, with the understanding that a given later commmunicates directly only with the two layers immediately above and below it.

Answer 2

Layers

Question 3

An Application hand off a chunk of data to the TCP library, which in turn makes calls to the IP library, which in turn calls the Lan layer for actual delivery.

Answer 3

Layers

Question 4

An application does not interact directly with the IP and LAN layers at all

Answer 4

Layers

Question 5

This LAN physical/logical gives us the internet five-layer model

Answer 5

Layers

Question 6

Any one network connection has a data rate : the rate at which bits are transmitted.

Answer 6

Data Rate

Question 7

The speed at which data is transferred within the computer or between a peripheral device and the computer, measured in bytes per second.

Answer 7

Data Rate

Question 8

Is the amount of data moved successfully from one place to another in a given time period, adn typically measured in bits per second (bps), as in megabits per second (Mbps) ir gigabtis per second (Gbps).

Answer 8

Throughput

Question 9

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.

Answer 9

Bandwidth

Question 10

are modest-sized buffers of data, transmitted as a unit through some shared set of links

Answer 10

Packets

Question 11

is collection of data that can be used by computers which need to communicate with each other, usually as part of a network.

Answer 11

Packets

Question 12

Datagram packet switching networks like the internet, fix these drawbacks by cutting data into small chunks called Packets .

Answer 12

Packets

Question 13

contains instructions about the data carried by the packet.

Answer 13

Header

Question 14

the actual data is referred to as the payload. Therefore, the payload is the only data received by the destination system.

Answer 14

Payload

Question 15

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.

Answer 15

Trailer

Question 16

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 telecommunication various types of networks, including command and control radio networks, industrial field busses and computer networks.

Answer 16

Topology

Question 17

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.

Answer 17

Routing Loops

Question 18

is the reduced quality of service that occurs when a network node or link is carrying more data than it can handle.

typical effects include queueing delay, packet loss or the blocking of new connections.

Answer 18

Congestion

Question 19

The term “__________ _______” is abstract, but the concept applies to network structure.

Answer 19

Broadcast Domain

Question 20

is a situation where there are unexpectedly too many requests on a network.

this creates a situation where a network does not have the ability to process all the requests at once.

Answer 20

Broadcast Storms

Question 21

bandwidth refers to the “size of the pipe” in which Internet data can travel through. If the pipe is not large enough for all the traffic to move through at once, there becomes congestion.

Answer 21

Low Bandwidth

Question 22

when building out a network, there needs to be the integration of hubs. Hubs retransmit data over a network.

In an enterprise network, a hub is what connects the network to the public Internet.

This connection point offers a prime location for potential congestion. Thus, consider how to integrate the hub within the network.

Answer 22

Adding Retransmitting Hubs

Question 23

is where a network allows many computers to speak to each other simultaneously.

two packets transferred at the same time can cause a collision. This collision causes network congestion.

Answer 23

Multicasting

Question 24

Data transmitted through outdated switches, routers, servers, and Internet exchanges can cause bottlenecks.

If the hardware is not optimal, this creates a bottleneck for the transmission of data. The result is network congestion.

Answer 24

Outdated Hardware

Question 25

Fat fingers and misconfiguration are two things that can cause network congestion.

This is like a car. When no maintenance is performed, there is a chance for a break- down.

Answer 25

Bad Configuration Management

Question 26

are any foreign devices on your network.

This can be as simple as a neighbor coming onto a residential WiFi connection. Or, as severe as a hacker breaking into an enterprise network.

Answer 26

Rogue Adapter Broadcasts

Question 27

An Internet Service Provider (ISP) can determine how fast it sends traffic over its network.

The opposite result of this is the ISP can also slow the rate at which data is moving over its network.

Answer 27

Artificial Congestion

Question 28

is a communication protocol for Local Area Network (LAN) using same media interfaces (mainly RJ45 or fiber).

is a local area 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.”

Answer 28

Ethernet

Question 29

LAN are independent networks but may be linked within a WAN through Internet devices such as Routers.

36

there is no difference in network and Ethernet cables. Network cables comprises of Ethernet and Lan cable.

Answer 29

LAN

Question 30

is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries.

its routing function enables internetworking, and essentially establishes the Internet.

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

IP addresses (for the most-common version 4, which we denote IPv4) are 4 bytes (32 bits), and are part of the IP header that generally follows the Ethernet header.

Answer 30

Internet Protocol (IP)

Question 31

the entire suite is commonly referred to as TCP/IP.

originated in the initial network implementation in which it complemented the Internet Protocol (IP).

Answer 31

Transmission Control Protocol (TCP)

Question 32

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.

Answer 32

Domain Name System (DNS)

Question 33

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 network and an untrusted network, such as the Internet.

Answer 33

Firewall

Question 34

is useful to determine if another machine is accessible.

Answer 34

Ping

Question 35

To find your own IP address you can use ipconfig on Windows, ifconfig on linux and Macintosh systems, or the newer ip addr list on linux.

Answer 35

ifconfig, ipconfig, ip

Question 36

Internet Models / Layers ( 5 )

Answer 36

1. Application Layer
2. transport Layer
3. Internet Layer
4. Link Layer
5. Physical Layer

Question 37

Packets parts ( 3 )

Answer 37

1. Header
2. Payload
3. Trailer

Question 38

Causes of congestion ( 8 )

Answer 38

1. Broadcast Storm
2. Low Bandwidth
3. Adding Retransmitting Hubs
4. Multicasting
5. Outdated Hardware
6. Bad Configuration Management
7. Rogue Adapter Broadcasts
8. Artificial Congestion