I'd say the IBM T42 should be a decent machine if you want it more for business purposes. You don't get these at CompUSA and BestBuy, however. They are more sturdily built than most I have seen. I am using an older T30 series for work and it's been faultless so far. T42s come with about everything but firewire built in. It's the one drawback I can think of. You'll need a cardbus (PCMCIA) device for such if you need firewire but USB2 is on board as well as a wireless port. You mentioned needing a network port and this is standard with most anyway. The T42 has an RJ45 port like most. Hope this helps and you get other recommendations.
Please some give me the latest Laptop PC configuration.
I need to buy a Laptop to work in My office desktop which is easy to carry,
what basically i will need is a network port.
please give me a good brand with a latest configuration.