UDP Interview Questions And Answers

The first thing is UDP is connection less where as TCP is
connection oriented.The broadcasting and multicasting
software is available in the UDP only.Why because it is
connection less hence we can broadcast the packets very
easily,no need to wait for connection like in tcp,which
takes more delay.

to implement the udp service we must creat socket by socket
system call which takes argument as SOCK_DGRAM which is
used for to pass the data in the form of datagrams.

Actually ip header is not in a udp message.. it a comes at
network link layer while udp messege generate at transport
layer so that it's a tricky question and meaningless.....i
think so... may be not sure

In IP Header Protocol field is available,it tells which
protocol it is using as a transportlayer,if this field is
having 6(in decimal)it indicates TCP,17(in decimal)it
indicates UDP.

Named after the Trojan Horse of ancient Greek history, a
trojan is a network software application designed to remain
hidden on an installed computer. Trojans generally serve
maliciious purposes and are therefore a form of malware,
like viruses.
Trojans sometimes, for example, access personal information
stored locally on home or business computers, then send
these data to a remote party via the Internet.
Alternatively, trojans may serve merely as a "backdoor"
application, opening network ports to allow other network
applications access to that computer. Trojans are also
capable of launching Denial of Service (DoS) attacks. A
combination of firewalls and antivirus software protect
networks against trojans.

Trojans are similiar to worms. In contrast to worms and
viruses, however, trojans do not replicate themselves or
seek to infect other systems once installed on a computer.

Two types of transmissions

1. Serial
2. parallel

serial means sending one bit at a time on a single wire
used over long distances
more efficient
used to send data to external systems

Parallel means sending bits at a time on different wires
used over short distances
efficient but not serial
used to send data in internal transfers

We need 10 bits to show 1024 colors in a binary system,
therefore 10 bits are required for each pixel to be
addressed.
We need 1300*1000*10 bits to send a complete content of a
screen.

26ms

how long does it take to send out 100 bits?
100/2000 = 0.05 sec

How long does it takes to send out a single character of 8 bits?
8/2000 = 0.004 sec

How long does it take to send a file of 100000 characters?
As, single character is of 8 bits.So,
{8*100000}/2000 = 400 sec

No SSL can not support in UDP beacuse in UDP is a
connectionless protocol it is focused on the speed than the
security.

ISP: (internet service providers)who provides internet
services
work of ISP:
1)providing internet services i.e ips
2) web server sevices
3) Virtual hosting(manage web server ,domain and users
intenet related works)

No. The IP address of a system is the logical address where
as the address of the MODEM is the MAC(Media Access Control)
adderess, it is the physical address provided by the
vendor.

UDP is the faster protocol as it doesn't wait for
acknowledgement so it is not at all having reliability as
compared to TCP.