Please read these instructions to find a satellite photo image of your home town: Put your mouse cursor near your location, click down and drag to the middle. Alternatively, type the name of your location here: Centre the map around. Now enlarge the map scale by using the + sign on the upper left side of the map. Click on this and the map will enlarge. Repeat the process of mouse dragging to centre the map as necessary. Choose the Map, Satellite or Terrain photo image as you get closer and hopefully you will find your town.
The protocol to which the rule will apply must be specified. Most often, this is TCP, UDP, or ICMP, but other protocols such as ESP, AH, and GRE are regularly encountered when dealing with VPNs. Some confusion arises when a person is really unsure of what protocol to use.
Key Difference: TCP stands for transport control protocol. It is a connection oriented and reliable protocol and is used for transfer of crucial data. On the other hand, UDP stands for User Datagram Protocol. It is an unreliable and connection-less protocol which is used for services that require fast transmission of data.