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Q. Explain physical layer of Osi reference model?
- The physical layer deals among the physical characteristics of the transmission medium.
- It defines the mechanical, electrical, procedural and functional specifications for maintaining, activating and deactivating the physical link between end systems.
- Such characteristics like timing of voltage changes, voltage levels, physical data rates, maximum transmission distances, physical connectors and other similar attributes are defined by physical layer specifications.
- Instances RJ45, EIA/TIA-232 and NRZ
You are designing a network for a retail customer; they plan to have 5 locations initially with the main store acting as the warehousing depot. Within the next year they are plann
Q. Modem stands for modulator - demodulator ? - Modulator are to creates an analog signal from binary data - Demodulator are to recovers the binary data from the modulated s
Prepare the Network Step 1: Cable a network that is similar to the one in the topology diagram. You can use any current switch in your lab as long as it has the needed inte
Header length This field specifies the length of the TCP header in 32 bit words. This information allows the receiver to know the beginning of the data area becau
What is Microwave? Microwaves have been used in data communications. Microwave has a higher frequency than radio waves and thus can handle larger amounts of data.
Explain the building blocks of Client/Server? The client side building block runs the client side of the application. The server side building block runs the server side of
Explain how does IGRP work?
Inside a device, every address mask is stored as a 32-bit number. When we submit a prefix and an address mask they use a changed form of dotted decimal addressing known CIDR addres
Network Allocation Vector Timer which shows how much time must pass before a station is allowed to check the channel
Consider the procedure described for estimating average delay di. Suppose that u=0.1. Let r1-t1 be the most recent sample delay, let r2 -t2 be the next most recent sample delay
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