Compute the hash - part of the packet, Computer Networking

In this question, we study Nested ESP in AH, that is, we combine ESP with AH. Let's look at the site-to-site VPN scenario shown again in Figure 1. Let's assume that Alice's desktop is on VPN Site 1 while Bob's is on VPN site 2. Assume the IP address of Alice's desktop is 130.2.3.244; the IP address of Bob's desktop is 166.100.66.2. In addition, because neither Alice nor Bob trusts all employees in their companies, they would use the Transparent Mode of ESP.

1336_Compute the hash - part of the packet.png

When Alice sends message "Stock X price $29" to Bob, the message sender program running on Alice's desktop needs to firstly compose the packet before it is encrypted. This cleartext packet will be the exact same packet in your answer for Question 3.1. Next, the sender packet will use ESP to encrypt the packet. After this packet is encrypted, what does the packet look like? Please draw the whole packet and mark the fields that are encrypted.

Next, Alice's message sender program will apply the AH protocol so that all IP spoofing attacks and message replacement attacks can be defeated. To compute the hash, which part of the packet resulted from Question 4.1 will be used as the input?

After the hash is computed by Alice's message sender program, the hash will be included in which part of the packet sent out from Alice's desktop?

After a while, the packet will arrive at the VPN router on site 2. Will the VPN router decrypt the packet? Why?

After a while, the packet will arrive at Bob's desktop. Is it possible for Bob to decrypt the packet and get the message before the AH header is verified? Why?

After the packet arrives at Bob's desktop, please give a step-by-step answer on how the AH header is verified by the receiver program running on Bob's desktop.

During the whole process from (4.1) to (4.6), where is the IKE protocol used?

Posted Date: 2/16/2013 4:38:12 AM | Location : United States







Related Discussions:- Compute the hash - part of the packet, Assignment Help, Ask Question on Compute the hash - part of the packet, Get Answer, Expert's Help, Compute the hash - part of the packet Discussions

Write discussion on Compute the hash - part of the packet
Your posts are moderated
Related Questions
Network Allocation Vector Timer which shows how much time must pass before a station is allowed to check the channel

Question The circuit in the figure is driven by a 9 mV amplitude signal generator with an output impedance of 2 kW. What is the output voltage amplitude from the circuit in the

State the Nyquist theorem The Nyquist theorem is thermo of mathematics and has nothing to deal with technology. It says that if you have the function whose Fourier spectrum doe

IEEE 8021.d Spanning Tree Protocol (STP) was developed to stop routing loops in a network. If a router, switch, or hub has more than one path to the similar destination, a routing

what is a WAN

NICs Network interface cards, commonly referred to as NICs are used to connect a PC to a network. The NIC gives a physical connection among the networking medium and the comput

Control Commands: The STAT command is used as a way for the client to confirm that the server is still responding properly. The server must simply send a positive command res

Define the analog audio and video conferencing systems When analog audio and video conferencing systems were used, the procurement and installation was complex, less reliable a

Can you describe the broader steps of how L2F establishes the tunnel?

A socket is an abstraction that shows an endpoint of communication. Most applications that consciously use TCP and UDP do so by making a socket of the appropriate type and then per