ADSL Modem/Router

The most fundamental role of a router, Network Address Translation, allows multiple computers to share a single Internet connection.

Packet filter
A firewall feature that inspects data travelling between the Internet and the local network. By comparing each packet to predefined rules, only those that meet certain criteria will be allowed through.

Port forwarding/port range forwarding This is a useful feature that lets you configure the router to forward all connections on one or more defined ports to a specified IP address on the local network. This is particularly useful for file sharing and peer-to-peer applications running on a shared connection.

Routing information protocol is the method by which routers identify the best pathway for sending data packets. The original RIP-1 has been replaced by RIP-2, which uses much more efficient procedures to perform the same task. Unless you are running multiple networks connected by routers. However, it is unlikely that you will benefit much from version 2 of this technology.

SNTP facility
The Simple Network Time Protocol can be used to synchronise the clocks on all computers in a network. If a router has this feature, it can be used as the source clock which itself is synchronised via the Internet.

Stateful Packet Inspection is a dynamic firewall function that monitors data traffic passing through a router for common attacks such as port scanning.

Static routing
In home or small business routers, static routing refers to the ability to set predefined routing rules. This is an advanced feature that is useful for redirecting certain types of traffic to nominated IP addresses or network interfaces.

IP over ATM is a means of sending Internet Protocol data over an ADSL connection. Some routers will support this low level protocol, although PPPoA and PPPoE are more commonly used.

Point-to-point protocol over Ethernet is a technology for transmitting PPP traffic over an Ethernet connection. PPP is the protocol used to establish conventional dial-up connections with functions such as dynamic IP assignment, authentication and encryption.

Point-to-point protocol over ATM is similar to PPPoE except that it communicates with the ADSL connection mostly at the hardware level, making it slightly faster. Not all ISPs support PPPoA, however, but most modems will provide the option to use either.

Embedded PPPoX log-in clients
Almost all routers will have the ability to automatically log in to the ADSL connection via a built-in or external modem. PPPoX simply means that the log-in procedure can use either PPPoA or PPPoE.

Join the Good Gear Guide newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Staff Writers

PC World
Show Comments

Most Popular Reviews

Latest Articles


PCW Evaluation Team

Matthew Stivala

HP OfficeJet 250 Mobile Printer

The HP OfficeJet 250 Mobile Printer is a great device that fits perfectly into my fast paced and mobile lifestyle. My first impression of the printer itself was how incredibly compact and sleek the device was.

Armand Abogado

HP OfficeJet 250 Mobile Printer

Wireless printing from my iPhone was also a handy feature, the whole experience was quick and seamless with no setup requirements - accessed through the default iOS printing menu options.

Azadeh Williams

HP OfficeJet Pro 8730

A smarter way to print for busy small business owners, combining speedy printing with scanning and copying, making it easier to produce high quality documents and images at a touch of a button.

Andrew Grant

HP OfficeJet Pro 8730

I've had a multifunction printer in the office going on 10 years now. It was a neat bit of kit back in the day -- print, copy, scan, fax -- when printing over WiFi felt a bit like magic. It’s seen better days though and an upgrade’s well overdue. This HP OfficeJet Pro 8730 looks like it ticks all the same boxes: print, copy, scan, and fax. (Really? Does anyone fax anything any more? I guess it's good to know the facility’s there, just in case.) Printing over WiFi is more-or- less standard these days.

Ed Dawson

HP OfficeJet Pro 8730

As a freelance writer who is always on the go, I like my technology to be both efficient and effective so I can do my job well. The HP OfficeJet Pro 8730 Inkjet Printer ticks all the boxes in terms of form factor, performance and user interface.

Michael Hargreaves

Windows 10 for Business / Dell XPS 13

I’d happily recommend this touchscreen laptop and Windows 10 as a great way to get serious work done at a desk or on the road.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?