Networking

Recently, A Canadian Geek pointed out that Microsoft Vista’s firewall did little to firewall outbound traffic.  This is no surprise to me because software firewalls have one flaw; they allow the user to make the decision on what flows in and out.  Hardware based, external firewalls are going to allow you to configure them but [...]

Ever wonder what port a particular application runs on?
Ever see a firewall log and wonder what program uses what port?
The IANA is here to help you and so am I. You can get an updated copy of the IANA Port Numbers here at chrisshort.net.
This text file is updated automatically every Sunday at midnight.

Originally Written 31 Jan 2004
orkut.com is a social networking service developed in association with Google. Why the name Orkut? Buyukkoten Orkut, a Google employee that has a significant interest in social networking, developed the service. How did Mr. Orkut have time to develop such a project? Google has a creativity policy of sorts that encourages [...]

Originally Written 03 May 2003
Recently there has been a huge push by digital subscriber line (DSL) providers to take a bigger chunk of the broadband market away from cable internet service providers. This has become even more apparent in recently thanks to Verizon and SBC (and I’m sure others will follow suit) dropping their prices [...]

Originally written 20 Mar 2003
For many years now I’ve had the belief that Internet sociology exists. The belief came to light during my tenure as the webmaster for SanTech Computer Services. Everyone has their own personality, patterns, tendencies and so forth, this also holds true for Internet usage. Everyone uses the Internet differently. For some, [...]

Originally Written 06 Mar 2003
Wireless networking appears to be emerging from a geeky toy to a viable network solution. However, it has many hurdles and several leaps and bounds to be made before I’ll personally consider it a viable solution. Two major hurdles are speed and security. Another major hurdle is survivability. Radio wave communications [...]

Network Time Protocol (NTP) is a very nice feature for networks that utilize multiple devices that have administrators who view logs on a regular basis, web sites that make financial transactions, and employee time clock management systems (these are just a few examples). NTP is designed to keep accurate local time keeping. Having four different [...]

DS-0
64 kbps
Basic channel of data or voice

Integrated Services Digital Network (ISDN)
128 kbps
Useable available bandwidth of a BRI

Basic Rate Interface (BRI)
144 kbps
Two 64 kbps “bearer” (voice or data) channels B) and one 16 kbps “delta” (signaling) channel (D) 2B+D.

T1, DS-1
1.544 Mbps
24 DS-0s

Primary Rate Interface (PRI)
1.544 Mbps
23B+D

E1
2.048 Mbps
32 DS-0s

DS-1c
3.152 Mbps
Two DS-1s

T2, DS-2
6.312 Mbps
96 DS-0s

E2
8.448 Mbps
Four E1s

10BaseT Ethernet
10 [...]