Internet-bad Communications
If you u the Internet, then you probably u Internet-bad communications to contact family, friends or co-workers. From nding an instant message to a friend, to e-mailing co-workers, to placing phone calls, to conducting video conferences, the Internet offers a number of ways to communicate.
The advantages of Internet-bad communications are many. Since you're already paying for an Internet account (or your employer is), you can save money on phone calls by nding someone an instant message or by using V oIP instead of standard local telephone rvices. Of cour, no technology is without a downside and Internet-bad communications has plenty, such as virus, privacy issues and spam. Like all technologies (and especially technology tied to the Internet), the way we can communicate online is constantly evolving . In this week's "Did Y ?" article we'll take a look at some of the most popular forms of Internet-bad communications.
Instant Messaging
One of the fastest-growing forms of Internet communications is instant messaging, or IM. Think of IM as a text-bad computer conference between two or more people. An IM communications rvice enables you to create a kind of private chat room with another individual in order to communicate in rea
l-time over the Internet. Typically, the IM system alerts you whenever somebody on your buddy or contact list is online. Y ou can then initiate a chat ssion with that particular individual.
One reason that IM has become so popular is its real-time nature. Unlike e-mail, where you will wait for the recipient to check his or her e-mail and nd a reply, if a person you want to reach is online and available in your IM contact list, your message appears instantly in a window on their screen.
炒豇豆的做法While IM is ud by millions of Internet urs to contact family and friends, it's also growing in popularity in the business world. Employees of a company can have instant access to managers and co-workers in different offices and can eliminate the need to place phone calls when information is required immediately. Overall, IM can save time for employees and help decrea the amount of money a business spends on communications.
Key Terms To Understanding Internet-bad Communications.
SIP
Short for Session Initiated Protocol, or Session Initiation Protocol, an application-layer control protocol; a signaling protocol for Internet Telephony. SIP can
establish ssions for features such as audio/videoconferencing, interactive gaming, and call forwarding to be deployed over IP networks.
WAP
Short for the Wireless Application Protocol, a cure specification that allows urs to access information instantly via handheld wireless devices such as mobile phones, pagers, two-way radios, smartphones and communicators.
More Internet-bad Communications Terms
E-mail
Instant Messaging
V oIP
V oWiFi
Internet Fax
Mobile IP
IP Address
While different IM clients offer slightly different features and benefits, the look and feel of an IM client is basically the same. Public IM clients and rvices available include ICQ, AOL Instant Mesnger (AIM), Microsoft MSN Mesnger, and Y ahoo! Mesnger. For business and enterpris looking for a more cure method of IM, there are enterpri IM packages available such as Microsoft Live Communication Server 2005 and IBM Lotus Instant Messaging. Third-party software is available to help business make using public IM rvices in the workplace more cure.
Some problems and issues associated with IM include spim and virus propagation. Spim is the IM equivalent of spam and is perpetuated by bots that harvest IM screen names off of the Internet and simulate a human ur by nding spim to the screen names via an instant message. The spim typically contains a link to a Web site that the spimmer is trying to market. Spim is a bit more intrusive than spam due to the nature of IM itlf. The advertiments and junk messages will pop-up in your IM window and you need to deal with the messages immediately, where with e-mail you can usually filter a lot of it out and deal with it later. Additionally, virus and Trojans can be spre
职业的英文ad through IM channels. The malicious programs are usually spread when an IM ur receives a message that links to a Web site where the malicious code is downloaded. The message will appear to be from a known IM contact, which is why recipients re more likely to click the hyperlink and download the file. Using safe chat rules (such as never clicking the link) and keeping an updated anti-virus program on your system will help reduce the chances of becoming infected by malicious programs being spread through instant messaging.
Internet Telephony & V oIP
Internet telephony consists of a combination of hardware and software that enables you to u the Internet as the transmission medium for telephone calls. For urs who have free, or fixed-price Internet access, Internet telephony software esntially provides free telephone calls anywhere in the world. In its simplest form, PC-to-PC Internet telephony can be as easy as hooking up a microphone to your computer and nding your voice through a cable modem to a person who has Internet telephony software that is compatible with yours. This basic form of Internet telephony is not without its problems, however. Connecting this way is slower than using a traditional telephone, and the quality of the voice transmissions is also not near the quality you would get when placing a regular phone call.
Many Internet telephony applications are available. Some, such as CoolTalk and NetMeeting, come bundled with popular Web browrs. Others are stand-alone products. Internet telephony products are sometimes called IP telephony, V oice over the Internet (VOI) or V oice over IP (V oIP) products.
V oIP is another Internet-bad communications method which is growing in popularity. V oIP hardware and software work together to u the Internet to transmit telephone calls by nding voice data in packets using IP rather than by traditional circuit transmissions, called PSTN (Public Switched Telephone Network). The voice traffic is converted into data packets then routed over the Internet, or any IP network, just as normal data packets would be transmitted. When the data packets reach their destination, they are converted back to voice data again for the recipient. Y our telephone is connected to a V oIP phone adapter (considered the hardware aspect). This adapter is connected to your broadband Internet connection. The call is routed through the Internet to a regular phone jack, which is connected to the receiver's phone. Special hardware (the phone adapter) is required only for the nder.实习周记300字
Much like finding an Internet rvice provider (ISP) for your Internet connection, you will need to u a V oIP provider. Some rvice providers may offer plans that include free calls to other subscribers on their network and charge flat rates for other V oIP calls bad on a fixed number of calling minute
s. Y ou most likely will pay additional fees when you call long distance using V oIP. While this sounds a lot like regular telephone rvice, it is less expensive than traditional voice communications, starting with the fact that you will no longer need to pay for extras on your monthly phone bill.
E-mail如何挑选玉手镯
Short for electronic mail, e-mail is the transmission of messages over communications networks. The messages can be notes entered from the keyboard or electronic files stored on disk. Most mainframes, minicomputers and computer networks have an
e-mail system. Some e-mail systems are confined to a single computer system or network, but others have gateways to other computer systems, enabling you to nd electronic mail anywhere in the world.
Using an e-mail client (software such as Microsoft Outlook or Eudora), you can compo an e-mail message and nd it to another person anywhere, as long as you know the recipient e-mail address. All online rvices and Internet Service Providers (ISPs) offer e-mail, and support gateways so that you can exchange e-mail with urs of other systems. Usually, it takes only a few conds for an e-mail to arrive at its destination. This is a particularly effective way to communicate with a group beca
u you can broadcast a message or document to everyone in the group at once.
One of the biggest black clouds hanging over e-mail is spam. Though definitions vary, spam can be considered any electronic junk mail (generally e-mail advertising for some product) that is nt out to thousands, if not millions, of people. Often spam perpetrates the spread of e-mail Trojans and virus. For this reason, it's important to u an updated anti-virus program, which will scan your incoming and outgoing e-mail for virus.
For more information on e-mail, e "Deciphering Internet E-mail", a Webopedia Quick Reference.
养鸡方法
IRC
赞美兰花的经典诗句
Short for Internet Relay Chat, IRC is a multi-ur chat system that allows to people gather on "channels" or "rooms" to talk in groups or privately. IRC is bad on a client/rver model. That is, to join an IRC discussion, you need an IRC client (such a mIRC) and Internet access. The IRC client is a program that runs on your computer and nds and receives messages to and from an IRC rver. The IRC rver, in turn, is responsible for making sure that all messages are broadcast to everyone participating in a discussion. There can be many discussions going on at once and each one is assigned a unique channel. Once you have joined an IRC chat room (chatroom discussions are desi
gnated by topics), you can type your messages in the public chatroom where all participants will e it, or you can nd a private message to a single participant. With many IRC clients you can easily create your own chatroom and invite others to join your channel. You can also password protect your chatroom to allow for a more private discussion with just people whom you invite. Once you become familiar with your IRC client you'll find many options available to help you moderate and take part in a channel. One problem commonly associated with IRC is lag. IRC relies on the connections between the rvers, and the connections or the rvers can slow down. If you're in a discussion and people do not respond, or you notice that people are responding to things you types veral minutes ago, then you can attribute this to lag. If you continue to experience lag, you can try connecting to
the IRC network on a different rver.
Videoconferencing
Videoconferencing is a conference between two or more participants at different sites by using computer networks to transmit audio and video data. Each partic ipant has a video camera, microphone and speakers connected on his or her computer. As the two participants speak to one a
nother, their voices are carried over the network and delivered to the other's speakers, and whatever images appear in front of the video camera appear in a window on the other participant's monitor.扫除天下
In order for videoconferencing to work, the conference participants must u the same client or compatible software. Many freeware and shareware videoconferencing tools are available online for download, and most Web cameras also come bundled with videoconferencing software. Many newer videoconferencing packages can also be integrated with public IM clients for multipoint conferencing and collaboration.天蝎男摩羯女
In recent years, videoconferencing has become a popular form of distance communication in classrooms, allowing for a cost efficient way to provide distance learning, guest speakers, and multi-school collaboration projects. Many feel that videoconferencing provides a visual connection and interaction that cannot be achieved with standard IM or e-mail communications.
SMS & Wireless Communications
Short message rvice (SMS) is a global wireless rvice that enables the transmission of alphanumeric messages between mobile subscribers and external systems such as e-mail, paging and voice-mail systems. Messages can be no longer than 160 alpha-numeric characters and must c
ontain no images or graphics. Once a message is nt, it is received by a Short Message Service Center (SMSC), which must then get it to the appropriate mobile device or system. As wireless rvices evolved, Multimedia Messaging Service (MMS) was introduced and provided a way to nd messages comprising a combination of text, sounds, images and video to MMS capable handts.
Communication on wireless devices such as mobile phones and PDAs is frequently changing. Today you can u your wireless device to not only make phone calls, but to nd and receive e-mail and IM. While you can u e-mail, IRC or IM for free if you have an Internet account, you will end up paying fees to you mobile carrier to u the rvices on a wireless device.
