Explain to an audience how LANs are interconnected via routers to make an Autono

Question

Explain to an audience how LANs are interconnected via routers to make an Autonomous System (AS) and these AS's are connected via routers and gateways into WANs, and how the IP and TCP provides routing and reliable end-to-end connection. Also, talk about the lack of security in TCP and IP, and how we use various tools for packet capture and dumping to analyze malicious traffic and test our own networks.

Explain one type of SSL packet (Observed on Wireshark) and identify what type of packet it is (e.g., client hello, server hello, record, alert, etc.)

Explanation / Answer

The Internet consists of interconnected autonomous systems.An AS typically consists of many networks,where a network(also called an IP network)was defined in the previous section.System is administrated independently.

Networks within an autonomous system communiacate routing information to each other using an Interior Gateway Protocol(IGP).An autonomous system shares routing information with other aautonomous systems using the border Gateway Protocol(BGP).Prevously,the Exterior Gateway Protocol(EGP)was used.In the future,the BGPis expected to be replaced with OSI.

Wireshark is one of the security tool used as a netwir packet analyzer and lets examine the traffic flowing into and out of network.Wireshark is used to troubleshot networking problems,but itis also an excellent way to learn exaclty how the network protocols work.For example it allows us to see the data that your system sends and receives when you type a web address into a web browser.

Each of the SSL records begins with the same threee fields(with possible different values).One of the fields in "content type"and has length of one byte.List all threee fields and their lengths.

The three fields and their lenghtd include content Type-1byte:version -2byte :Length-2byte

Expand the Client Hello record(if your tracecontains multiple ClientHello records.

The Client hello record advertise the cipher suites it supports.The cipher suite specification listed are:Elliptical curve Diffe Helleman for piublickey Encryption,AES for symmetric keyencryption and SHA for hashing.

The cipher suite for servers is RSA,RC$ and SHA.The purposeod session ID is to keep track of sessionbetween client and server.The SSL certificate takes one frame to be send from server to client.

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.