Wireless(review)

802.11a (1999) 802.11a speed

◦ 54 Mb/s & frequency of 5 GHz

Used by ◦ Government buildings◦ Older style networks

802.11b (1999) 802.11b speed

◦ 11 Mb/s & frequency of 2.4 GHz

Used by◦ Legacy equipment

802.11g (2003) 802.11g speed

◦ 54 Mb/s & frequency of 2.4 GHz

Used by

802. 11n (2009) 802.11n speed

◦ 54 Mb/s to 600 Mb/s ◦ frequency 2.4 & 5 GHz

Used by

Wireless Security

Ad hock modePeer 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 encryptionOpen Shared

WEP

WPA

WPA2

Opened SharedNo security?

Why use it?(who)

WEPWired 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

WPAWI-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 802.11i 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

WPSWi-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 SafeTurn 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!