Group1_Charisma: Selective Repeat ARQ Ppt

Group1_Charisma:Questions and Answers

1. What is the difference between fragments and packets? (Questioned by Supriya)

Ans: There exists something called maximum resolution unit (MRU) which gives the maximum size of a packet which can be transmitted through a network. If the packet size exceeds this limit, it has to be fragmented. Each fragment has an identifier and ultimately once the fragments are transmitted, they are reassembled to get the original packet back. (Answered by Sridevi)

2. What is an open port? (Questioned by Bhargavi)

Ans:Open port is a TCP/IP port number that is configured to accept packets. Open port is considered a potential security risk and acts as an avenue for attack. Hackers use port scanning software to exploit the open ports.
In contrast, a closed port is a port which is set to deny all packets with that port number. (Answered by Ramya)

3. Explain 3 way handshake. (Questioned by Dhanusha)

Ans:Consider host A downloading some data from host B. Host A initially sends a SYN flag to host B which then responds by sending an ACK along with a SYN flag indicating it is ready for the virtual connection to be established. Finally host A sends an ACK and the virtual connection gets established.
Two synchronous flags are involved in a given data transfer, one sent by host A and the other by host B. (Answered by Nagchandrika)

Group1_Charisma:Mandatory Blog

Team Name: Charisma
Team Members: M Ramya(1MS07IS042), Madhura S Karanth(1MS07IS042), Nagchandrika Rao(1MS07IS056), Sridevi YV(1MS07IS137)
Group A Project Chosen: Network Protocol Analysis
Group B Project Chosen: Selective Repeat ARQ
Presentation Date of Group A Project (Completed / Not Completed as on Blog Date): Completed (On 21st October,2009).
Presentation Date of Group B Project (Completed / Not Completed as on Blog Date): Not completed. (To be presented on 18th November,2009)
Group A PPT Uploaded(Yes or No): Yes
Group B PPT Uploaded(Yes or No): No
Group A Project Report Made(Yes or No): No
Group B Project Report Made(Yes or No): No
Group A Project PROBLEMS FACED and SOLVED Blog Uploaded(Yes or No): Yes
Group B Project PROBLEMS FACED and SOLVED Blog Uploaded(Yes or No): No

Group1_Charisma:Network Protocol Analysis Ppt