Computer Networks Answers

please give a strictest possible filter table and a strictest possible connection table to stateful firewalls, but complete 1,2,3,4 tasks:
1. Allows all internal users to establish SSH sessions with external hosts
3. Allows all DNS traffic
2. Allows the external users to surf the company web site at 222.22.0.12
4. But otherwise blocks all inbound and outbound traffic
Internal network is 222.22.0.0/16.
In solution, assume the connection table is currently caching 3 connections, all from inside to outside. You need to create the appropriate IP address and port number.

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?

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)

1. Explain how network adaptors and protocols are checked?

Compare the OSI and TCP/IP reference models in computer networks.

What is an intranet network ? Describe its advantages and disadvantages.

Explain the routing of call through strowger step by step switching system.

What are the two classes of computer network architecture ?

Ce projet consiste à implémenter une architecture logicielle (composants, connecteurs,
codes…) au choix répondant aux cas suivants :
1er Cas : Avec UML
Architecture logicielle d’un GAB. Décrire le type d’architecture utilisée, ses
avantages et inconvénients.
2e cas : Avec ADL ADA ou autres ADL

list and explain how networking troubleshooting steps operate.