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List the layers of OSI
There are seven layers in OSI model
a. Physical Layer
b. Data Link Layer
c. Network Layer
d. Transport Layer
e. Session Layer
f. Presentation Layer
g. Application Layer
Routing Table A routing table has columns for at three types o information the network ID the cost and the ID of the next router. The network ID is the final desti
State the methods to keep the attackers at bay Another best methods to keep the attackers at bay is known as network address translator or NAT. The philosophy behind the design
Network Layer and Routing As discussed in previous chapters the physical layer provides connection sand services to the data link layer while the data link layer is
Q. Explain Types of Redundancy Checks? Parity Check Simple Parity Check Two Dimensional Parity Check / Longitudinal Redundancy Check (LRC) CRC (Cyclic Redund
State the Example of security audit as case study Linda narrates one of her experience about a security audit. She was performing a spot audit where she was checking certain
What is multiplexing and demultiplexing? Explain. Describe Time division, Frequency division and Wavelength division multiplexing. What is ADSL? How does it use multiplexi
Define Decoder? A device or program that translates encoded data into its original format (e.g. it decodes the data). The term is often used in reference to MPEG-2 video and so
What is a binary semaphore? What is its use? A binary semaphore is takes only 0 and 1 as values. They are used to execute mutual exclusion and synchronize concurrent p
Q. What is Subnetting ? Subnetting IP addressing is hierarchical First reach a device through its network id (netid) Then reach the host itself using the se
What is a protocol? The term protocol refers to a set of rules and process that govern the transmission of messages over a physical networking medium. The most common network p
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