Adding Serial Ports to a Computer with Only USB Ports by Preston Wily
So you bought a new computer but you don't have serial ports? It's surprisingly common these days - you find an awesome machine that does everything you want it to do, but then you get home and find out that amongst the lightning-fast processor and terabyte hard drive, you're missing something -... Add a true serial port with a USB adapter You can use a USB to Serial Adapter to easily and quickly add a serial port to your laptop. ... Various serial devices requiring some type of serial port Many PDA's, GPS units, routers, printers, fax machines, etc.

Network+ / CCNA Certification Exam Tutorial: Port Numbers And Troubleshooting by Chris Bryant
Passing the Network+ and CCNA exams demands that you know quite a few port numbers, but they're important to know when working with real-world networks as well. Before we discuss why, here's a partial list of important port numbers to know for these certification exams: Ports 20 and 21 are used... Port 143 is used by IMAP. ... Port 110 is used by POP3. ... When you're faced with a list such as this, there's a temptation to ask yourself something like this: "Besides passing the exam, do I really need to know these port numbers?" The answer is yes.

Cisco CCNP / BCMSN Exam Tutorial: Static VLANs by Chris Bryant
BCMSN exam success and earning your CCNP certification requires you to add to your knowledge of VLAN configuration. When you studied for your CCNA exam, you learned how to place ports into a VLAN and what the purpose of VLANs was, but you may not be aware that there are two types of VLAN... The problem is that a trunk port belongs to all VLANs by default, and we want to put this port into a single VLAN only. ... To do so, we run the switchport mode access command to make the port an access port, and access ports belong to one and only one VLAN.

Port Forwarding (what is Port Forwarding) by Edgar Lee
The term Port Forwarding is referred to the technique of forwarding a network port from one particular machine to another machine. This technique is usually applied when the receiving machine is behind a network router. By doing this, it enables users from outside the LAN (local area network) to... You will need to set up port forwarding rules for every port which you are using and any rules set up for a certain port will only work for that certain port. ... If you have set up a port forwarding rule for computer A and port 6000, the external IP address's port 6000 is also in use.

Kansas City Computer Repair: I Can't Get To My Banking Pages Anymore by Olan Butler
This is a common problem that occurs on all sites that use the https:// in the web page address. I have seen this problem exclusively on computers that are using Norton Internet Security or Norton Firewall. The problem stems from corruption in the Norton software. ... The http:// communications on port 80 which is the default port for all Internet traffic. ... However, there are specialty sites and pages that need to work more securely such as https:// which communicates on port 443. ... For whatever reason, the Norton software becomes corrupt and then blocks traffic on port 443.

Cisco CCNP / BCMSN Exam Tutorial: Configuring PortFast And BPDU Guard by Chris Bryant
In your CCNA studies, you learned about PortFast and the trouble it can cause if configured on the wrong port! Suitable only for switch ports connected directly to a single host, PortFast allows a port running STP to go directly from blocking to forwarding mode. ... If any BPDU comes in on a port that's running BPDU Guard, the port will be shut down and placed into error disabled state, shown on the switch as err-disabled. ... SW1(config-if)# Not only will the switch warn you about the proper usage of PortFast, but you must put the port into access mode before PortFast will take effect.

Implementing Number Portability In Mobile Communication by Balamurugan Balusamy
a)OFF-SWITCH SOLUTIONS There could be two ways to access the database, using the All-Call-Query, or the Query-on-Release methods. a.1 ALL-CALL-QUERY METHOD The originating network first checks the location of the dialed number in the central database and then routes the call directly to the... Designing efficient, simple, secure and yet practical porting procedures for number portability may involve addressing issues such as the role of retailers, the need to change SIM cards or handsets, existing customer obligations, authentication of customers requesting a port, communication...

Adding USB 2.0 by Meryl K. Evans
The process of adding USB 2.0 ports took no time and the backup system is mighty fast. If you add USB 2.0 ports with a PCI port card, then you'll still have your USB 1.1 ports, so whatever is plugged into those can stay. Rob Foster from the UK sent me a port PCI USB card since he had a few extras. ... The card came with four USB ports, one of which holds the backup system. ... Well, it only took a year or so to get around to adding the USB 2.0 ports as that's about how long the back up system has been sitting here taunting me.

How Port Forwarding Works by John Vizaniaris
Port forwarding is one area where people get confused the most. The reason, in my opinion, is that each router manufacturer has their own different way of doing it. Port forwarding is used if you have a router in your home or workplace. What it does is opens up a specific port to a specific... Once you are there, you will need to enter in the port start & finish range, whether it is a TCP or UDP port, the name you want to give this setting and the IP address of the computer you are forwarding the port to.

Easy Guide on Networking Your Home Computers by Pinky Mcbanon
Easy Guide on Networking your Home Computers Let's say you have 3 desktop computers at your home. One in your kid's room, in your home-office and one in your family room. Your idea is to have all these 3 computers connect to the internet. One computer has an internet connection on a DSL or... And then, you will notice your computer#1's network cable directly connect to this modem called the Ethernet port (or on the USB port). ... (considering ofcourse we are networking a Window-based computers-- Windows XP (home & professional) and Windows 2000 and higher) (5) Connect a network cable on...