Structure Of The Internet

Question 1

What does WWW stand for?

Answer 1

World Wide Web

Question 2

What does the WWW do?

Answer 2

A collection of web pages that reside on computers connected to the Internet

Question 3

Who created the concept of the WWW?

Answer 3

Sir Tim Berners-Lee

Question 4

How does each continent connect to each other?

Answer 4

Using backbone cables by trans-continental leased lined fed across the sea beds

Question 4

What are Internet Service Providers (ISP) and how do they help connect internet access to nations and people?

Answer 4

They connect to the backbone and distribute the Intent connection to smaller provides who in turn provide access to individuals

Question 5

What does URL stand for?

Answer 5

Uniform Resource Locator

Question 6

What does a URL do?

Answer 6

It’s the full address of an Internet resource, it specifies the location, resource name and file type

Question 7

What is the point of an URL?

Answer 7

So that a browser can request a resource from a websites server

Question 8

What is an Internet registrars?

Answer 8

They hold records of all existing websites and the details of those domains that are available to purchase

Question 9

What is ICAAN, who govern Internet registrars?

Answer 9

International Corporation for Assigned Names and Numbers

Question 10

What do Internet registrars allocate out and keep track off, which identifies the area or domain an Internet resource resides in?

Answer 10

DNS

Question 11

What does DNS stand for?

Answer 11

Domain Name System

Question 12

How is DNS structured?

Answer 12

Into a hierarchy of smaller domains and written as a string separated by full stops

Question 13

How many IP address does each domain name have?

Answer 13

One or more equivalents

Question 14

What catalogues all domain names and IP addresses in a series of global directories that domain name servers can access inn order to find the correct IP address for a resource?

Answer 14

DNS

Question 15

What includes the host server name depending on whether the resource being requested in hosted on the web, mail or ftp server?

Answer 15

Fully Qualified Domain Name (FQDN)

Question 16

What is an IP or Internet Protocol address?

Answer 16

A unique adresse that is assigned to a network device that indicates where a packet is to be sent to or has been sent from

Question 17

How can Routers use IP addresses?

Answer 17

Routers can use this address to direct the data packet accordingly

Question 18

What is Wide Area Networks (WANs)

Answer 18

An network of inter-connected interworks spread over a large geographical area

Question 19

What is Local Area Networks (LANs)

Answer 19

An number of computing drives on a single site or a single building connected together usually by cables

Question 20

What is the advantage and disadvantage of LANs?

Answer 20

They transmit data very fats but only over a short distance

Question 21

What are three LAN topologies?

Answer 21

Physical Bus topology, Physical Star Topology, Mesh Network Topology

Question 22

What is an physical bus topology?

Answer 22

All computers are connected to a single computer and the ends of the cable are plugged to a terminator

Question 23

What is the advantages of a physical bus topology?

Answer 23

Inexpensive to install, as less cable than star topology and doesn’t require any additional hardware

Question 24

What is the disadvantages of a physical bus topology?

Answer 24

If the main cable fails, network data can no longer be transmitted to any of the nodes, performance degrades with heavy traffic, low security as all computers on the network can see all data transmissions

Question 25

What is an physical star topology?

Answer 25

A network that has a central node, which may be a switch or computer, which acts as a router to transmit data

Question 26

What can a switch do on a physical star topology?

Answer 26

keeps a record of the unique MAC address of each device on the network and can identify which computer on the network it should send the data to

Question 27

What are the advantages of a physical star topology?

Answer 27

If one cable fails only one station is affected, consigned performance even under heavy use, higher transmissions speeds can give better performance than a bus network, system more secure as message sent directly and easy to add ne nations without disrupting the network

Question 28

What are the disadvantage of a physical star topology?

Answer 28

May be costly because of the length of cable required and if the central device goes down network data can no longer be transmitted

Question 29

What the difference between a physical and a logical topology?

Answer 29

A physical topology is its actual design layout and a logical topology is the shape of the path the data travels in and describes how components communicate across the physical topology

Question 30

What is Wi-fi?

Answer 30

A local area wireless technology that enables you to connect computing devices

Question 31

What is Wireless Access Point (WAP)?

Answer 31

In order to connect a wireless network a computer device needs a wireless network adapter, the WAP connects itself to a router and helps connect devices to a router to the internet

Question 32

What is a mesh network topology?

Answer 32

Each node had connection to another node, by transmitting data across any intermediate nodes but only one node requires a connection to the internet and all others share this connection

Question 33

What are the advantages of a wireless mesh network?

Answer 33

No cabling cost, the more does installed, the faster and more reliable the network becomes, new nodes are automatically incorporated into the network and faster communication since packets do not need a central switch