Network security questions

There are eight network security questions. I have answered the questions however, I am unclear if I am correct. Please review and if I am wrong, please provide the correct answer along with your explanation. 1. Which of the following pieces of information can be found in the IP header? a. Source address of the IP packet b. Destination address for the IP packet c. Sequence number of the IP packet d. Both (A) and (B) only. My answer is d. 2. We also don’t want our undeliverable packets to hop around forever. What feature/flag limits the life of an IP packet on the network? a. Time to Live counter b. Subnet Mask c. Header Checksum ... click for more

Networks

1. Provide the different access protocols, such as Carrier Sense Multiple Access (CSMA), Carrier Sense Multiple Access with Collision Detection (CSMA/CD) and Wavelength Division Multiplexing Access (WDMA). Where would these types of protocols would be used? Explain the situations with examples. 2. Describe an example of the Public Key Infrastructure that would explain the differing usages of symmetric and asymmetric encryption and how these encryption methods might use either a substitution or a transposition cipher.

Decryption algorithm

Using RSA, choose p = 5 and q = 7, encode the phrase “hello”. Apply the decryption algorithm to the encrypted version to recover the original plain text message.

Email/database server

The email database server is designed to accept multiple incoming requests via a socket in order to locate a specific message and return it to the client email browser (such as Outlook Express). Why the server may launch a thread to handle each incoming request. What benefit does the threading operation provide for processing purposes? What OS services a server will access in order to create a socket listener. What is the best to support multiple incoming requests via threads.

Of the two types of Intrusion Alarm Systems why are there two?

Of the two types of Intrusion Alarm Systems why are there two? Why is one not sufficient Intrusion detection systems, or IDSs, have become an important component in the Security Officer's toolbox. However, many security experts are still in the dark about IDS, unsure about what IDS tools do, how to use them, or why they must. This article will offer a brief overview of intrusion detection systems, including: a description of what IDSs are, the functions they serve, the two primary types of IDS, and the different methods of intrusion detection that they may employ.