Abstract: A photography device includes a light transmitter, a light receiver, a processor, an adjustable focusing lens, and a driving module. The light transmitter is configured to transmit light to an object. The light receiver is configured to receive the reflected light. The processor is configured to generate a driving value according to transmission and reception of the light. The adjustable focusing lens has a focal length. The driving module is configured to adjust the focal length by driving the adjustable focusing lens according to the driving value.

Abstract: A photography device includes a light transmitter, a light receiver, a processor, an adjustable focusing lens, and a driving module. The light transmitter is configured to transmit light to an object. The light receiver is configured to receive the reflected light. The processor is configured to generate a driving value according to transmission and reception of the light. The adjustable focusing lens has a focal length. The driving module is configured to adjust the focal length by driving the adjustable focusing lens according to the driving value.

Abstract: A system and method for a communication connection in network architecture are provided. First, a client terminal is linked to a target terminal via the Internet. Then whether the link mode is a virtual link or a substantial link is determined. If the link mode is the substantial link, the client terminal is communicationally connected to the target terminal via the substantial link. If the link mode is the virtual link, whether a local area network is linked via a STUN server is determined. If yes, a peer-to-peer link is built via the STUN server. If no, the client terminal is communicationally connected to a management server of the local area network, and then the management server is communicationally connected to the target terminal.

Abstract: A file sharing method includes: transferring content information related to a to-be-shared file to an address mapping server; and the address mapping server providing an accessible address mapped to the to-be-shared file according to the content information. One advantage of using the above file sharing method is that the user who wants to share files does not need to apply network space and upload the files beforehand.

Abstract: A method and a system for setting a domain name and a network device thereof are provided. In the invention, the network device includes built-in identification information, and the identification information is stored in a back-end database. When the network device receives a domain name, it transmits setting information to a server device. Then, the server device queries the identification information in the back-end database according to the setting information to authenticate the network device. After the network device passes the authentication, the server device maps the domain name to an Internet protocol address. Therefore, a step of registering an account and a password is omitted to simplify a procedure of setting the domain name.