VoIP: A New Frontier for Security and Vulnerabilities Essay -- essays

VoIP: A New Frontier for Security and Vulnerabilities Introduction to Voice over IP Technology   Ã‚  Ã‚  Ã‚  Ã‚  The promise of extremely cheap telephone service, utilizing the Internet to transmit voice, has made voice over IP an attractive and profitable idea. Vonage (http://www.vonage.com/) and other service providers entice consumers by charging a flat, monthly rate for unlimited long distance in the U.S. and Canada; the rate is often less than it would cost for a regular phone line without any long distance charges. An entity with an enormous call volume, such as a worldwide retail corporation, could benefit from tremendous cost savings by transitioning all of its telephony networks to VoIP.   Ã‚  Ã‚  Ã‚  Ã‚  Voice over IP uses a server to connect all telephones in a local area network and act as a gateway for VoIP packets traveling to and from the Internet. Consumers with broadband internet connections can purchase VoIP handsets or routers with an RJ-11 jack to connect regular telephones. Businesses must implement a VoIP application server to handle corporate telephone use, much like mail servers are used to manage email. The Internet Protocol Private Branch eXchange (IP PBX) is telephone equipment used by private companies, rather than telephone service providers, for the management of VoIP calls placed on the data network. When considering VoIP, organizations should focus on necessary quality of service (QoS) requirements, the cost to implement, and a number of security precautions needed to protect the network (Mullins, 2005). Protocols   Ã‚  Ã‚  Ã‚  Ã‚  The two most common protocols central to VoIP are Session Initiation Protocol (SIP) and H.323. Both also rely on a number of other protocols, such as DNS and ENUM, in order to locate and navigate to other hosts on the Internet.   Ã‚  Ã‚  Ã‚  Ã‚  SIP first uses either TCP or UDP to signal a host on port 5060; then the Real-Time Transport Protocol (RTP) is used to transmit an audio stream over UDP ports 16384 through 32767 (Mullins, 2005). It is a broader specification, generally used to connect network devices to servers or other kinds of control equipment. SIP supports user authentication and the transmission of any type of media, including audio, video, and messaging.   Ã‚  Ã‚  Ã‚  Ã‚  On the other hand, H.323 is a bit more complex, deri... ....org/columns/futuretense/2005/03/08.shtml. Hall, M. (2005, March 21). SIP tips VoIP into secure. Computerworld. Retrieved March 24, 2005 from the World Wide Web: http://www.computerworld.com/printthis/2005/0,4814,100497,00.html Korzeniowski, P. (2005, February 16). Why VoIP is raising new security concerns. IT Manager’s Journal. Retrieved March 24, 2005 from the World Wide Web: http://software.itmanagersjournal.com/print.pl?sid=05/02/11/0028208. McArdle, D. (2005, February 18). Group tackles VoIP security fears. ElectricNews.Net. Retrieved March 24, 2005 from the World Wide Web: http://www.enn.ie/print.html?code=9589191. Mullins, M. (2005, November 3). Doing the VoIP security groundwork. CNETAsia. Retrieved March 24, 2005 from the World Wide Web: http://asia.cnet.com. Rendon, J. (2004, December 8). The security risks of VoIP. CIO News. Retrieved March 24, 2005 from the World Wide Web: http://searchcio.techtarget.com/originalContent/0,289142,sid19_gci1032194,00.html. Sullivan, A. (2005, March 21). Scam artists dial for dollars on Internet phones. Computerworld. Retrieved March 24, 2005 from the World Wide Web: http://www.computerworld.com/printthis/2005/0,4814,100549,00.html.

Far from the madding crowd Essay

In ‘Far From the Madding Crowd’, Thomas Hardy examines different types of love. Consider the relationships Bathsheba has with Gabriel, Boldwood and Troy; consider also Troy’s relationship with Fanny Robin. What conclusions does Thomas Hardy wish us to draw about the nature of love? Support the points you make with close reference to the text. You must also mention the social context of the novel and any relevant literary tradition. Bathsheba is a very vain woman who likes to think very highly of herself, in the first appearance she makes in the novel, she is admiring herself in the mirror. The last word in Chapter 1 is ‘vanity’. Hardy has established some of the features of two of the main characters and made us curious about this development of the relationship between Oak and this vain but handsome girl. Bathsheba was not a conventional woman of her time. She was an unusual for a woman of her time because she was very independent. She also refused her first offer of marriage although penniless and living with her aunt. Women at this time relied heavily on marriage. Women at that time often also married for security. Bathsheba is quite teasing with men, for example, when Gabriel Oak holds her hand, she suggests: â€Å"But I suppose you are thinking you would like to kiss it? You may if you want to. † But when Gabriel says, â€Å"I will. † She instantly says, â€Å"No you wont! † This shows that she is teasing, and she can get some men crazy about her. Her relationship with Gabriel has its ups and downs. Gabriel cares for Bathsheba so much but as the novel goes on, Gabriel realizes that there is no chance that he will marry Bathsheba because two other obstructions are in the way, the similarly vain Sergeant Troy and Mr. Boldwood. Bathsheba’s relationship with Mr. Boldwood is very awkward because, she only sent the valentine letter as a prank. It all started off when Liddy and Bathsheba were writing a Valentine letter to ‘little Teddy Coggan’. But Liddy suggests, â€Å"What fun it would be to send it to the stupid old Boldwood, and how he would wonder! † Bathsheba does not agree to the idea at first and says, â€Å"No, I won’t do that. He wouldn’t see any humour in it. † She was right. But Boldwood takes it so seriously and becomes absolutely obsessed with her, â€Å"My life is a burden without you, I want you – I want you to let me say I love you again and again! † When Bathsheba tells him the truth about the Valentines card, Boldwood does not want to and cannot accept the fact that it was a joke and a prank: â€Å"No, no, no. Don’t say thoughtlessness! Make me think it was something more – that it was a sort of prophetic instinct – the beginning of a feeling that you would like me. † Then Troy comes into the novel. During that period of time, there were strict rules governing the etiquette of behaviour about men and women being alone together and they certainly would not publicly touch each other or their clothes. This makes their meeting highly irregular. Bathsheba would be particularly vulnerable in this situation. Troy is similarly vain and teasing like Bathsheba, this enchants her, â€Å"Thank you for the sight of such a beautiful face! † He also often repeats the word, â€Å"Beauty† aimed obviously at Bathsheba. When they depart after their first ‘encounter’, she is very happy and feels flattered. She looks in the mirror (as usual) and repeats Troy’s words, â€Å"Goodnight †¦ beauty! † Bathsheba is aware of her beauty, and she feels that if some handsome man in uniform compliments her on her looks, then that is very rewarding for her and it boosts her self-confidence. Also, Troy’s showmanship with his sword swept Bathsheba off her feet. Also, because Bathsheba would have been very nai ve and inexperienced in the ways of love, she found it very hard to resist Troy. Bathsheba and Troy’s relationship, was more of a sexual love than a real love: â€Å"She felt powerless to withstand or deny him. He was altogether too much for her. † Another sign of Bathsheba’s vanity was that, she only married Troy because he had said he saw a more beautiful woman. So, Bathsheba went all the way to Bath just for Troy. But later on in the novel, Troy does not show that same feelings as when they first met. Instead, Troy becomes more involved into Fanny Robin and regrets ever turning her down. The type of love Fanny Robin loves Troy with all her heart; she even walks miles just for him. Many young women in the Victorian times would have eloped to marry soldiers. This was called ‘Scarlet fever’. This would be a disgrace to the girl and her family. Hardy’s aunt Martha was said to have eloped with a soldier When she asks Troy when they will be wed, Troy does not even understand what she is talking about. Fanny asks, â€Å"When will it be? † Troy then asks â€Å"What? † Then Fanny tries to remind Troy, â€Å"That you promised. † Troy again, forgetful, â€Å"I don’t quite recollect† Then Fanny desperately says, â€Å"O you do! Don’t speak like that. It weighs me to the earth. It makes me say what ought to be said first by you. † Fanny wants to get desperately married, but Troy wants her mainly for sex and for more of a ‘casual’ relationship. Troy gets very angry and upset when he sees the coffin with Fanny Robin and the baby in it. Tragically, Fanny died of childbirth. The baby was still born. Many deaths occurred due to lack of technology including childbirth. He completely forgets about what he had with Bathsheba and thinks of what he could have had with Fanny. Troy’s reaction to her death and his disregard for Bathsheba shows he is the type of man who only wants what he cannot have. When Fanny was alive, Troy showed little interest in her predicament. I think that the message Thomas Hardy is trying to get out is that love can only be true, not just for jokes and pranks (the valentines letter. ) Love also has to have two people involved not like Fanny Robin and Troy at the start of the novel. In conclusion, Hardy ended the novel happily, because he knew that is what the readers wanted to read. The story was printed into a monthly magazine and for a Victorian readership; a happy end involved a marriage. Bathsheba was first attracted by Troy’s good looks and superficial charm and preferred these qualities to the more traditional ones of security and love offered by Oak and Boldwood. But when Fanny dies, Bathsheba finally realizes that Troy’s is actually a womanizer and he is disloyal. Hardy, himself did not rate marriage very highly as he had an unhappy marriage. So by the end of the novel, Bathsheba becomes more sensitive to others and realizes that she should have accepted Oak’s initial proposal, rather than Troy’s, and that she would have been much happier with Oak.

Communication Accommodation Theory And Social Structure

This essay focuses on the communication accommodation theory along side the concept of discourse and social structure, and the power effects of labels. In intercultural communication, language facilitates understanding and although is an imperative role, at times, it can be a barrier. To assist this understanding, the communication accommodation theory focuses of the view that individuals adjust their verbal communication (p. 56). In intercultural communication, the partner’s ability to understand is done through strategies of convergence or divergence. This signals their attitudes towards each other because people adjust communication behavior based on the perception that an individual has of the conversation partner’s communicative behavior. Intercultural encounters are likely to entail more of an adjustment than communicating with an individual of a similar culture. Repetition of the message and perhaps animated gestures are more common in these interactions to make up for misunderstood verbal communication. Discourse refers to written or spoken communication. Therefore, when speaking of discourse analysis we can understand it as the study of language. However, discourse analysis goes ‘beyond the sentence’ and is not only concerned with the study of grammar such as semantics, phonetics, syntax and morphology, yet takes into consideration the larger discourse context. This allows for a clearer understanding in how the surrounding historical and social contexts canShow MoreRelatedThe Co Cultural Theory : A Wide Range Of Diversity Essay1324 Words   |  6 Pagesrecently adjusted to the social acceptance of The LGBT community (Lesbian, Gay, Bisexual, and Transsexual). It is important that we evaluate the implications that the LGBT minority group are faced with. 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