A socket is an object, an abstraction, it allows you to use a certain class to communicate with remote machines or devices, servers or even with another application on the same machine. Think about a socket as a telephone connection one-to-one to another town or an appartment next door. Generally, sockets do not allow multiple users (applications) to tap into one socket. Sockets are divided into server sockets and client sockets. Server sockets are also called listeners. They may be inactive for indefinite time and their function is to wait for the client(s) to send something. On one server there might be numerous sockets for variaous clients but it is always one-to-one.
1 A natural stone fireplace might cost $2,500 to $3,500, while a stone veneer fireplace costs about 25% less (or $1,875 to $2,625). 2  If you plan on using gas burning logs in the fireplace, add $750 to $1,000 for a gas log kit.
1 Stone veneer siding costs $10 to $15 per square foot ($15,000 to $22,500). 2  Engineered stone siding costs $7.50 to $15 per square foot ($11,250 to $22,500). 3  Removing and disposing of existing siding, if not included in the initial estimate, might cost an additional $ 1 to $3 per square foot ($1,500 to $4,500).