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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
What are the drawbacks of wireless devices One drawback is security. Every random delivery man who happens to be in building can listen on network. Another weakness is reliabil
Q. What is Two Types of Errors? Single-Bit Errors: Merely one bit in the data unit has changed Burst Errors of length 'n': 2 or more bits in the data unit have changed (
What is Network Architecture? When two or more computer are linked with one another for the purpose of communicating data electronically, besides physical connection of comput
Explain everything you can tell from the following: a. 00-01-00-01-13-FD-F4-C0-00-1E-33-92-CE-99 b. fe80::2c1e:18af:749b:91c5%12 c. 2002:8b64:6e3a::8b64:6e3a d. ::0
Explain is the concept of routing tables?
Directly linked network have the lowest administrative distance of 0. They are considered the most reliable.
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
Q. Describe Network security and Internetworking security? Network Security - Layers 5-7 - Securing the localized private domain. Network Administration, File Permissions
What are the Communication tools ? Voice mail ? Email ? Fax ? Video conferencing applications
What are the advantages and disadvantages of the three types of routing tables? The three types of routing tables are fixed, dynamic, and fixed central. The fixed table must be
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