Distributed Systems: TCP, Mutex Algorithm, Digital Signature, Web Server and Web Service

Table of Contents
1. Question 1...........................................................................................................................................1
1.1 Answer 1.1..................................................................................................................................1
1.2 Answer for 1.2............................................................................................................................2
1.3 Design and Implementation of TCP.........................................................................................3
2. Question 2...........................................................................................................................................4
2.1 Digital Signature........................................................................................................................4
3. Question 3...........................................................................................................................................4
3.1 Design and Implementation of Mutex Algorithm....................................................................4
4. Question 4...........................................................................................................................................5
4.1 End Point....................................................................................................................................5
4.2 RPC style....................................................................................................................................5
4.3 Look Up......................................................................................................................................5
4.4 4. Use of wsimport tool..............................................................................................................6
4.5 Web server and Web Service....................................................................................................6
References..................................................................................................................................................6

1. Question 1
1.1 Answer 1.1
TCP UDP
The benefits of TCP applications are less
transmission time and high unwavering
quality.
The application of UDP is that productive and
quick transmission like amusements. The
servers answer the small questions from
immense quantities of customers is the most
important stateless nature of UDP.
In TCP, there is unshakable certainty that the
information exchanged stays flawless and
lands in a similar request in which it was sent.
In UDP, there is no assurance that the
messages or bundles sent would reach by any
means.
TCP is substantial weight. It requires three
packages to set up a connection for
attachment, before any client information can
be sent. Blockage control unwavering quality
are handled by TCP
UDP is lightweight rather than TCP. So there
is no requesting of messages, no following
connections, and so on. It is a little transport
layer planned over IP.
Real Time Application Examples of TCP:
 Web
 IMAP/POP, getting mail
 SMTP, sending letters
 FTP, SSH, telnet
Real time examples of UDP:
 Games that run based on local
broadcast algorithm. So that we can
run the application various machines.
 Media streaming
 Tunneling/VPN
1.2 Answer for 1.2
Thread per request Thread per connection
Thread per-request for scales superior to
thread per-connection.
Less efficient rather than Thread per request.
In the Thread per request for display, the
thread is just related while a demand is being
prepared. That for the most part implies that
the administration needs less threads to deal
HTTP connection requires altogether less
assets than a thread stack, in spite of the fact
that there is a point of confinement of 64K
open connections for every IP address,