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Nikkei Network

March 2005

FEATURE 1

Technology that Supports IP Phones
Thorough Examination of SIP

- The role of SIP (Session Initiation Protocol) is to allow computers to communicate with each other directly via the Internet using various applications. Many people tend to think that SIP is used only for IP phones, but its application is not limited to IP phones. SIP is a general-purpose protocol that can perform a wider variety of tasks.
This article examines the capabilities of SIP from various points of view.


Basics: Inviting communication partners by letting them know your own situation

Services: Its services are seemingly complex, but they are just a combination of basic procedures

Q&A

Boxed Articles
- Operating a Windows-based SIP server
- Installing freeware SIP softphone
- Using capture software to analyze SIP packets on a network



FEATURE 2

How Can the Type of Data Be Identified?
Tasks of MIME

- E-mail and Web-browsing software converts received data into a suitable form and promptly displays it on the screen. In the past, only texts written in English could be sent via e-mail, but now it is possible not only to exchange e-mails in Japanese but also to attach files to e-mails and write HTML-based email messages.
These useful features are possible thanks to MIME (Multipurpose Internet Mail Extension), a standard for describing different types of data.
This article examines the performance of MIME, which is playing an important role behind the scenes.


Prologue: It was necessary to expand the functions of e-mail software that could only be used to exchange messages in English

Basics: There are three technological elements: notification, division, and encoding

Applications: Applications such as web access software use its specifications, and Media Type is widely used


Q&A: Deepen your understanding by studying the answers to simple questions

Question 1: How is the media type of an attached file decided?

Question 2: Why can a file whose name is turned into garbled characters find its destination?

Question 3: Is there any other way to use the multipart media type, in addition to its application to attached files?


KEY POINTS OF HOT TECHNOLOGIES

Differences among the Latest Versions of Web Browsers: Internet Explorer, Opera, and Firefox
- Are differences in usability large among them? Can data stored in a browser be transferred to other browsers?


STRATEGY FOR ENHANCING WINDOWS-BASED NETWORKS

Testing the Latest Version of SoftEther
- Router software, which provides an address translation function, has been added to the newest version


 

Nikkei Network

March 2005

FEATURE 1

Technology that Supports IP Phones
Thorough Examination of SIP

- The role of SIP (Session Initiation Protocol) is to allow computers to communicate with each other directly via the Internet using various applications. Many people tend to think that SIP is used only for IP phones, but its application is not limited to IP phones. SIP is a general-purpose protocol that can perform a wider variety of tasks.
This article examines the capabilities of SIP from various points of view.


Basics: Inviting communication partners by letting them know your own situation

Services: Its services are seemingly complex, but they are just a combination of basic procedures

Q&A

Boxed Articles
- Operating a Windows-based SIP server
- Installing freeware SIP softphone
- Using capture software to analyze SIP packets on a network



FEATURE 2

How Can the Type of Data Be Identified?
Tasks of MIME

- E-mail and Web-browsing software converts received data into a suitable form and promptly displays it on the screen. In the past, only texts written in English could be sent via e-mail, but now it is possible not only to exchange e-mails in Japanese but also to attach files to e-mails and write HTML-based email messages.
These useful features are possible thanks to MIME (Multipurpose Internet Mail Extension), a standard for describing different types of data.
This article examines the performance of MIME, which is playing an important role behind the scenes.


Prologue: It was necessary to expand the functions of e-mail software that could only be used to exchange messages in English

Basics: There are three technological elements: notification, division, and encoding

Applications: Applications such as web access software use its specifications, and Media Type is widely used


Q&A: Deepen your understanding by studying the answers to simple questions

Question 1: How is the media type of an attached file decided?

Question 2: Why can a file whose name is turned into garbled characters find its destination?

Question 3: Is there any other way to use the multipart media type, in addition to its application to attached files?


KEY POINTS OF HOT TECHNOLOGIES

Differences among the Latest Versions of Web Browsers: Internet Explorer, Opera, and Firefox
- Are differences in usability large among them? Can data stored in a browser be transferred to other browsers?


STRATEGY FOR ENHANCING WINDOWS-BASED NETWORKS

Testing the Latest Version of SoftEther
- Router software, which provides an address translation function, has been added to the newest version