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Computer Networks
Visit a host that uses DHCP to obtain its IP address, network mask, default router and IP address of its local DNS server. List these values and give screenshots of how you obtained them and describe.
Computer Networks
Assume user-1 and user-2 are communicating over an HTTPS session. Assume an attacker who does not have any of the shared keys, inserts a bogus TCP segment into a packet stream with correct TCP checksum and correct sequence numbers and correct IP addresses and correct port numbers. Will HTTPS at the receiving side accept the bogus packet and pass the payload to the receiving application? Discuss why or why not.
Computer Networks
Discuss why or why not.
If users A and B using HTTPS sessions to communicate with each other. Now, let we consider a case:one attacker who hasn't shared keys, a bogusTCP segment was inserted in a packet stream with {correct IP addresses,sequence numbers,TCP checksum,correct port numbers }. Does HTTPS on receiving end recognize and accept fake packets, and then pass the payload to receiving application?
If users A and B using HTTPS sessions to communicate with each other. Now, let we consider a case:one attacker who hasn't shared keys, a bogusTCP segment was inserted in a packet stream with {correct IP addresses,sequence numbers,TCP checksum,correct port numbers }. Does HTTPS on receiving end recognize and accept fake packets, and then pass the payload to receiving application?
Computer Networks
Assume you have an IP network connection with the following characteristics:
• 97% of packets reach their destination correctly in less than 50ms
• 1% of packets reach their destination correctly in more than 50ms but less than 10,000ms.
• 1% of packets are lost in transit
• 1% of packets arrive at their destination in less than 50ms but have one or two random single-bit errors.
For each of the following applications, indicate and explain your decision whether it would be best to use TCP with checksum, or UDP with checksum, or UDP without checksum:
(a) A live audio / video chat system like Skype
(b) A general purpose network file system such as NFS: https://en.wikipedia.org/wiki/Network_File_System
(c) Remote control of a bomb disposal robot (each packet contains an array of floating-point numbers indicating the current desired location of the robot)
• 97% of packets reach their destination correctly in less than 50ms
• 1% of packets reach their destination correctly in more than 50ms but less than 10,000ms.
• 1% of packets are lost in transit
• 1% of packets arrive at their destination in less than 50ms but have one or two random single-bit errors.
For each of the following applications, indicate and explain your decision whether it would be best to use TCP with checksum, or UDP with checksum, or UDP without checksum:
(a) A live audio / video chat system like Skype
(b) A general purpose network file system such as NFS: https://en.wikipedia.org/wiki/Network_File_System
(c) Remote control of a bomb disposal robot (each packet contains an array of floating-point numbers indicating the current desired location of the robot)
Computer Networks
1. Explain how network adaptors and protocols are checked?
Computer Networks
Compare the OSI and TCP/IP reference models in computer networks.
Computer Networks
What is an intranet network ? Describe its advantages and disadvantages.
Computer Networks
Explain the routing of call through strowger step by step switching system.
Computer Networks
What are the two classes of computer network architecture ?
Computer Networks
list and explain how networking troubleshooting steps operate.
