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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
Q. Unshielded Twisted Pair - transmission media? - A most common kind suitable for both voice and data transmission - Categories are determined by chain quality - Cat 3 c
Full-Duplex Ethernet 10Base5 as well as 10Base2 are half-duplex Full-duplex raises capacity of each domain No require for CSMA/CD
Simple Mail Transfer Protocol ( SMTP) SMTP is the principal application layer protocol for internet electronic mail. It uses the reliable data transfer service of TCP to
Network Devices a.Hub b.Repeater c.Bridge d.Gateway e.Switch f.Router Connecting devices can classified into networking and internetworking devices when
(i) Suppose that frames are 1250 bytes long including 25 bytes of overhead. Also assume that ACK frames are 25 bytes long. a) Calculate the efficiency of stop-and-wait ARQ in
How are routing neighbors discovered in BGP?
What are the two types of Transmission Technology available in ccna? Ans) Point - to - Point and Broadcast are the Two types of Transmission Technology available in CCNA
Load the Router with the Supplied Scripts Enable ! config term ! hostname Router1 ! enable secret class ! no ip domain-lookup ! interface FastEth
Q. Explain the Types of Security Service? Security Services fall into one of the subsequent categories - Confidentiality: Confirms that the info in a system and transm
Can you describe IP protocol?
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