Wireless(review)

802.11a (1999) a speed ◦ 54 Mb/s & frequency of 5 GHz Used by ◦ Government buildings ◦ Older style networks

802.11b (1999) b speed ◦ 11 Mb/s & frequency of 2.4 GHz Used by ◦ Legacy equipment

802.11g (2003) g speed ◦ 54 Mb/s & frequency of 2.4 GHz Used by

n (2009) n speed ◦ 54 Mb/s to 600 Mb/s ◦ frequency 2.4 & 5 GHz Used by

Wireless Security

Ad hock mode  Peer to peer Networking  Do you need an AP (Access Point)?  Made for small groups of people  Able to share printers  Transfer files  How do think this would come in handy?

Wireless encryption  Open Shared  WEP  WPA  WPA2

Opened Shared  No security?  Why use it?(who)

WEP  Wired Equivalent privacy ◦ One of the earliest encryption types. ◦ Uses 40-bit encryption or 104 bit encryption  How secure is it? ◦ No very secure -keeps the good people out- ◦ Not true end to end encryption

WPA  WI-FI Protection Access ◦ Battles WEP weakness by introducing TKIP  Temporary Key Integrity protocol (TKIP) ◦ TKIP provides a new inscription key for every sent packet  EAP (extendible authentication protocol)  This offered another way to authenticate other than MAC address (easy to sniff out).

WPA2  IEEE i standard or Wi-Fi protected Access 2  Introduced AES (advanced encryption standard) o Encryption 128,192,256-bits  Provides stronger encryption and cleans up some holes in WPA

WPS  Wi-Fi Protected setup (has 2 ways to configure) ◦ A button on your wireless device ◦ An 8 digit code that you input in on your device  Why? ◦ Your average technician can program a wireless WAP in about five minutes. ◦ Your average end-user is scared to do this.  BUT ◦ Security flaw!

Keep your Wireless LAN Safe  Turn off SSID broadcast  Turn off wireless access to Router  MAC address filtering  Change default IP address  Change default SSID

Portable computers Notebook Desktop replacement Netbook Ultra book Tablet PC's Tablets

Notebook & Desktop replacement components Notebook (everything can be considered a notebook) ◦ 10-17inch-Display screen ◦ Integrated graphics cards ◦ 2.5 Hard drive size ◦ Built in screen ◦ Pointer device ◦ IBM Track point ◦ Touch pad Desktop replacement ◦ Not light weight ◦ Dedicated graphics ◦ 1-2 TB Hard drive ◦ 16+ GB RAM

Netbook & Ultra book Netbook ◦ Light weight ◦ Good battery life ◦ 9 inch screen's ◦ Only for word processing Ultra Book (2011) ◦ Thin & light weight ◦ Netbook + desktop replacement ◦ Power of a desktop replacement that’s lightweight ◦ Permanent components

Native resolution XGA (eXtended Graphics Array) HD720 WXGA SXGA HD 900 UXGA (Ultra) HD 1080 WUXGA

Laptop FN FN Key ◦ Bluetooth button ◦ Wireless Button ◦ Brightness ◦ Volume ◦ Touchpad

Deadly Wireless Hardware Switch!

PCMCIA Personal computer memory card international association History ◦ Company that sets standards for personal computer. They specifically set standards on expansion cards. Parallel PC Card ◦ The older style laptops came with two 16-bit Slots. They came in three different types.

Types ◦ Older computers can accept two type 1& type 2 cards or one type 3 card.

Express card slots High- performance version of your parallel PC Card Two types Express Card /34 & express card / 54 Modern day card slot Same thickness as a type ii slot

Docking station Peace of Hardware that allows you to expand your ports external ports. Why do you need it? ◦ No one wants the desktop replacement/ and no one has enough money for an Ultra-book!