TCP/IP and DHCP

TCP/IP(Transmission control protocol/Internet protocol)

It is used for transmitting packets around the internet widely.It is used to transmit packets from one system to another across internet.TCP guarantees the delivery of packets as  according  to IP 

Few properties of TCP that  make it a protocol of choice
1)Connection oriented protocol : it establishes  a logical connection in what we call a three way hand shake means that there is  an acknowledgement between  TCP on both sides as to how packets would be send in what size ,what frequencies and what speed they will do the transmission
2)Proper  sequencing:it does proper  sequencing of packets to be sent from one session to another and is essential so that it can track what packets has been sent and what needs to be re-sent.
3)Sliding window:it allow TCP to check for messages that have been sent ,if they have been received and if they have not been received then re-sent the MSG so TCP will not go past one sliding window until the message has been acknowledged as received.It ensures guaranteed delivery of message
IP part of TCP is called internet protocol and its sole purpose is logical addressing. We need to know devices from where packets are coming and the devices from which packets are moving on the internet
Two version of IP
1)IPv4
2)IPv6

DHCP(dynamic host configuration protocol) 

Every computer  has to have an IP address to be connected on the internet .IP address is assigned  to requested client in Two ways:
1)Static IP
Static IP address is assigned manually means that one has to assign the IP address ,sub net mask  individually to each client on network which becomes difficult on  large networks because every IP is unique
2)Dynamic IP
Dynamic IP  is in which client get IP address from  the DHCP  server  automatically.IT automatically assign IP,sub net mask,default gateway and DNS server
DHCP scope
It assign IP address as a lease.A lease is the amount of  time an IP address is assigned to a computer.
Reservations are given to special devices such as router ,network printer etc because devices like them should be given same IP address constantly.