ICMP
tcp is the transport control protocol and ip is the internet protocol. tcp is concerned with guaranteed delivery of packets from source to destination, while ip is the protocol used to actually deliver packets. tcp is located at layer 4 of the osi model, or the transport layer. ip is located at layer 3 of the osi model, or the network layer. check out the video tutorials in the link below.
TCP and UDP are both communication network protocols. TCP protocol in its essence is to guarantee delivery of information, and in the order sent. UDP protocol is lighter, by fact of not checking for the connection to be ready to receive on the other end, not checking if the information getting to the other end is correctly received.
ISL IS A CISCO PROPRIETARY TUNNELING PROTOCOL, BUT 802.1 q IS A OPEN STANDARD PROTOCOL
SSL (Secure Socket Layer,) is a protocol. Most Cisco VPNs will use SSL as their security protocol, so there is no difference between Cisco VPN and SSL VPN.
FTP stands for file transfer protocol. FTP is used to transfer files between computers over the Internet. FTP servers can be setup to allow users to access the information anonymously or require registration for access.
It uses ICMP protocol - Internet Control Message Protocol
You can use the ping command to verify connectivity. Additionally you can use traceroute to determine how the packet reaches that destination.
protocol is a connection establishment between the source computer to destination computer ex: tcp / ip protocol
It uses ICMP ECHO requests, aka ping.
To establish connectivity between two computers, TCP/IP Protocol finds the destination device & then slices information into small chunks called Packets. These packets are wrapped with some information which helps packet sail through number of intermediary devices to the destination. After reaching destination, packets are reassembled into data onto the End device.
Traceroute
Tracert lists the places that a message passes from source to destination. Ping only says the computer destination is answering "yes, I'm here." Traceroute is like when you are making directions for friends to come to your house as you ride the route - "Turn right on 5th, left on 10th, 640 north, left on highway 251" Ping is a phone call where the other person picks up and says "I'm home" then hangs up.
Stop and wait protocol is used in telecommunications as a method to send information between two connected devices. It sends information in a Protocol Data Unit and waits for a response.
ICMP is the "Internet Control Message Protocol". ICMP packets are small packets used in local networks and on the Internet, most typically, for network troubleshooting and problem location. ICMP may be used for reporting the route packets are taking to reach an arbitrary destination either locally or on the Internet or to determine if a particular local or Internet connected device is reachable and/or responding. Various operating systems make use of the ICMP protocol for the above mentioned purposes via utilities such as 'traceroute' and 'ping' in the UNIX/Linux world, or 'tracert' and 'ping' in the Windows world. [JMH]
Stopping the message transfer between 2 persons , so that 2nd person can't receive the message.....
PROTOCOL
Border Gateway Protocol (BGP) is a way to transfer data and information between different hosts such the Internet or routers. It is commonly used between Internet Service Providers (ISPs).