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Question 1
a) Explain how CSMA/CD works. b) Describe the term "exponential back-off". c) Describe the differences between "circuit switching" and "packet switching".d) There are many good reasons why Virtual Private Network is being used.
i) Explain how VPN works. ii) Give three of those reasons.
Question 2
a) One of the five main functional areas in Network Management is "Accounting Management". Briefly describe its importance. b) Describe two approaches for the management system to obtain information from SNMP (Simple Network Management Protocol). Briefly describe each one. c) Give three advantages and three disadvantages of using centralized architecture. d) Name four goals of using clustering.
Problem a) Consider a 1000 Mbps Ethernet with a single Store-N-Forward switch mid-way in the path between two nodes A and B. Assume that there are no other nodes on the network
a) determine the RTT (round trip time) between a client requesting a web page of 1024 bytes in size from an internal web server on a 100 Base-T Ethernet. Assume a one-way propagati
Dynamic Packet Filtering Dynamic Packet Filtering is also referred to as stateful firewalling. Here the firewall maintains the status of connections as well. When a connection
Question : (a) "Pulse Code Modulation (PCM), as used in telephony, samples a signal at 8 kHz using 256 quantization levels". Outline how this scheme works with the help of ske
W h a t do you understand by the terms security, network security and information security? How network security and information security are connected? Security can be def
LEGAL, ETHICAL AND PROFESSIONAL ISSUES To minimize liabilities and reduce risks, information security practitioner should: • to understand current legal environment • to s
Question: (a) African governments are slowly shifting to more transparent ICT regulations. However, but limited spectrum availability remains a key barrier to sustaining lon
QUESTION (In this question, you will need to use the ISO 27001:2005 and ISO 27002:2005 standards) For each of the situations below, comment on the following: 1. Mention
every time i connect to WIFI the UC goes directly to 100% then i doesn''t want to come down. what shall i do ?
(a) Draw the waveform for an asynchronous transmission with the given specifications: 8 data bits with value 11010001 (LSB listed first here), one parity bit (even), one star
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