As more and more respondents have access to the Internet, online surveys, a form of computer-administered surveys, are often combined with some other method, such as telephone surveying, a form of person-administered surveying. This is an example of what type of survey?
a) Computer and self-administered survey
b) Multiple methodology survey
c) Combination methodology
d) Mixed-mode survey

Explain how email technologies enable the exchange of messages between users. find out the typical parts of an email address and explain each part.

1. which of the following statements are true about routers and routing on the internet. choose two answers. a. protocols ensure that a single path between two computers is established before sending packets over it. b. routers are hierarchical and the "root" router is responsible for communicating to sub-routers the best paths for them to route internet traffic. c. a packet traveling between two computers on the internet may be rerouted many times along the way or even lost or "dropped". d. routers act independently and route packets as they see fit.

The ieee 802.11: defines standards for wireless local area network (wlan) communication protocols. identifies various computers or devices connected to a network. verifies any resource attached to another computer on a network that is different from the computer to which the user is logged on. connects multiple local area networks (lans) and wide area networks (wans).