IGCSE Computer Science Paper-1: Specimen Questions with Answers 59 - 60 of 164

Question number: 59

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Short Answer Question▾

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List the main points of differences between LIFO and FIFO.

Explanation

Image of The LIFO and FIFO

Image of the LIFO and FIFO

The main points of differences are:

i) LIFO stands for Last in First Out whereas FIFO stands for First in First Out.

ii) In case of LIFO, the material received last is consumed first. Whereas in case of FIFO, the material received first is consumed first.

Question number: 60

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Short Answer Question▾

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Explain the following terms i) Wired Equivalent Privacy ii) Wireless Application Protocol, iii) LDAP (Light Weight Directory Access Protocol).

Explanation

i) Wired Equivalent Privacy: It is one of the security protocols specified by the IEEE Wireless Fidelity (Wi-Fi) standard, 802.11b. It provides a wireless local area network (WLAN) with a level of security. Open System authentication and Shared Key authentication are the two methods of authentication that can be used with WEP.

Image of The Wired Equivalent Privacy

Image of the Wired Equivalent Privacy

ii) Wireless Application Protocol: It is a communication protocol being used for wireless data access through most mobile wireless networks. This protocol further facilitates instant connectivity between interactive wireless devices (for eg mobile phones) and the Internet.

Image of The Wireless Application Protocol

Image of the Wireless Application Protocol

iii) LDAP (Light Weight Directory Access Protocol): It is a client/server based protocol that is being used to read and edit directories over IP Networks. This protocol is also used to access and manage directory information. During the general interaction, the client establishes a session with an LDAP server. The operation are then performed by the directory data. The session with the server gets closed as soon as the client finishes making requests.

Image of The Light Weight Directory Access Protocol

Image of the Light Weight Directory Access Protocol

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