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Q. Show VPNs Security and the Internet Model?
- VPN's Security and the Internet Model
- Application layer - provide for each application protocol (other layers may be left vulnerable)
- Transport layer - difficult to change existing protocols
- Network layer - IPsec (additional security for IP)
- Data Link layer - does not provide end-to-end security
Q. Describe Physical Layer in OSI layers model? Physical Layer : Controls the transmission of the actual data onto the network. It describes the electrical signals, line state
What is difference among ARP and RARP? The address resolution protocol (ARP) is used to associate the 32 bit IP address with the 48 bit physical address, used by a host or a ro
Define Bandwidth and Latency? Network performance is calculated in Bandwidth (throughput) and Latency (Delay). Bandwidth of a network is given by the number of bits that can be
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Facts about Fiber Optic Cables 1. Outer insulating jacket is made of Teflon or PVC. 2. Kevler fiber helps to strengthen the cable and prevent breakage. 3. A plas
Which command saves the configuration stored in RAM to NVRAM Ans) copy running-config startup-config is the command which saves the configuration stored in RAM to NVRAM
Name the two commands that save the running-config to a TFTP server Ans) Two commands are:- a) copy running tftp b) write network
When it comes to networking, what are rights? Rights refer to the authorized permission to perform exact actions on the network. Every user on the network can be assigned indiv
Question: (a) With the help of a diagram, describe a typical DNS system. (b) Using signal sequence or state transition diagrams, illustrate the following scenarios: i.
Options The options fields may be used to provide other functions that are not covered by the header. If the length of the options field is not a multiple of 32 bits
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