Short Answer -Class 10- Computer Science-Chapter 1- Networking

Short Answer -Class 10- Computer Science-Chapter 1- Networking

Q1. What is the meaning of uploading? Give some guidelines for safe downloads.

Ans.  Uploading is the transmission of data or file from a local computer to a remote computer, as fromyour users to easily exchange files over networks.

While downloading any file close all the applicationthat are running on your computer, let only on set-up file run at a time of downloading close all theimportant applications in order to be safe if something goes wrong while downloading set firewalls, andantivirus to actively scan all the files you download.

Scan all the files after you download whether from websites or links received form e-mails.

Always use updated antivirus, spam filter and spyware to help detect and remove virus, spyware fromthe application you want to download.

Q2. What is LAN?

Ans.  A LAN (local Area Network) connects network device over a relatively short distance .

A networked office building, school, or home usually contains a single LAN, though sometimes one building will contain a few small LANs (perhaps one per room ).

And occasionally a LAN will have span a group of nearby buildings. In addition of operating in a limited space, LANs are also typically owned, controlled, and managed by a single person or organization .

They also tend to used certain connectivity technologies, primarily, Ethernet and token Ring

Q3.  What is WAN?

Ans. A WAN (wide area network) spans large physical distance. The Internet is the small largest WAN,spanning the Earth.

A WAN is a geographically – dispersed collection of LANs. A network device called a router connectsLANs to a WAN. In IP networking, the router maintains booth a LAN address a WAN address.

WANs tend to use technology like ATM, Frame Relay and X.25 for connectivity over the longer distances

Q4. What is an IP address?  What are the types of IP addresses?

Ans. (a) Every machine in a network has a unique identifying number, called its IP Address. An IP address isa group of four bytes (or 32 bits) each of which can be a number from 0 to 255. A typical IP addresslooks like this:

(b) IP addresses are of two types: (i)Static IP Address: static IP addresses are those types of IP address that never change once they areassigned to a device on a network.

No doubt this type of addressing is cost effective but could have ahigh security risk. Static IP addresses are mostly used by wed email and gaming servers who don’t caremuch about hiding their locations.

(ii)Dynamic address: A Dynamic IP address changes each time the device logs into a network this kind of IPaddress is very tough to trace and are used by companies and business firms

Q5. What is DNS?

Ans. It is practically impossible for a person to remember the IP addresses of all the computers one mayhave to communicate with.

Therefore, a system has been developed which assigns names to somecomputer (wed servers) and maintains a database of these names and corresponding IP addresses.

These names are called Domain Names.

Q6. What are the different types of newsgroups?

Ans. The three major types of newsgroups are:

(i) standard newsgroups: these include high quality discussions which cannot be established without aformal voting procedure.

Hierarchies comp, sci, soc, news, rec, talk, misc.

(iii) biz newsgroups: these include the discussions on commercial uses.

Q7. How are files downloaded?

Ans. Downloading is transmitting data or their remote computer to a local computer. Downloadingenables users to save files on their own computers.

These files are downloaded using FTP (file transferProtocol).We can also use HTTP to download files from the web.From the internet client/user’s point of views, to download a file is to request is from another computeror form a web page on another computer and then receive or retrieve it.

Q8. List some advantages of blogs.

Ans.  (i) Blog sites can be developed with the help of simple procedures.

(ii) A blog can be read by anyone:

(iii) It improves writing skills of blogger:

(iv) It allows us to get feedback on our thoughts:

Q9. List some disadvantages of blogs.

Ans.(i) Sometimes, a lot of time.

(ii) Sometimes, people just blog with sloppy writing.

(iii) There is no confidentiality as it is a public forum.

(iv) Some people might give negative feedback in a harsh way