Introduction chapter 1-5 and on

List how to secure network

1. Change the default factory passwords. 2. Change the default SSID. 3. Turn on encryption. 4. Turn off the SSID broadcast. 5 filter enable MAC address ccttf

what is NAT?

Network Address Translation

Network Address Translation (NAT)

Translates the private IP address to a public address for routing over the Internet

PC Card

The PC card adapter connects to notebook computers and provides an RJ-45 jack for connecting to wired networks. This device supports connections to both 10 and 100Mbps networks

Which of the following issues should be considered when planning for a home network?

Data speed, Public access, and Cost,Appearance,Home access, Public.

Virtual Private Network (VPN)

Establishes a secure network connection and is a way to protect your LAN's data from being observed by outsiders

Securing home network(1) Change the default factory passwords

Wireless equipment is shipped with default passwords that are set at the factory. These default settings are known by the public including people who would like to gain access into your network and possibly change your settings. It is best that you select your own your password that is a combination of alphanumeric characters.

Access Point

is used to interconnect wireless devices and provide a connection to the wired LAN. The data transfer speeds, for access points, are dictated by the choice of wireless technology for the clients but this device will support Wireless-N.

How does MAC address filtering help to secure a wireless network?

This can be used to select which networking devices can be allowed access to the networking

Firewall Protection

Used to prevent unauthorized access to your network

Wireless Network

Uses radio signals to establish the network connection

Overloading

Where NAT translates the home network's private IP addresses to a single public IP address

Hotspots

A limited geographic area that provides wireless access for the public

Port Address Translation (PAT)

A port number is tracked with the client computer's private address when translating to a public address

Planning the Home Network(Ease of implementation)

A wireless home network is probably the easiest to implement if the cabling and connectors for a wired network are not already installed. The time required to install the wireless home network is usually minimal as long as unexpected problems do not surface.

Planning the Home Network(appearance)

A wireless home network offers the best choice in regards to appearance because there won't be cables and networking hardware scattered around the house. The wireless home network will require a wireless router and an external wired connection to the ISP (refer to Figure 1-11(b)).

Securing home network(5) filtering Enable MAC address

All computer devices use a unique MAC address for identifying the device. This can be used to select what devices can be allowed access to the network. *When MAC address filtering is turned on, only wireless devices that have specific MAC addresses will be allowed access to the network.

range extender

Device that relays the wireless signals from an access point or wireless router into areas with a weak signal or no signal at all

wireless router

Device used to interconnect wireless networking devices and to give access to wired devices and establish the broadband Internet connection to the ISP

Wired Network Advantages

Faster network data transfer speeds (within the LAN) Relatively inexpensive to set-up The network is not susceptible to outside interference

Planning the Home Network(cost)

Implementing a high-speed wired network can be quite expensive. With the networking hardware, cabling, and related hardware, you can incur an unexpected additional cost for implementing the high-speed wired home network. The cost of switching to or implementing an 802.11n Wireless-N network is minimal and is a suitable alternative to a wired network. But remember, the maximum data rate for a Wireless-N network is still much lower than that possible with a wired LAN.

Service Set Identifier (SSID)

Name that is used to identify your wireless network and is used by your access point or wireless router to establish an association

Securing home network(3) Turn encryption on

Probably the most important thing to do is turn on the security features which include the data encryption. *These options include the Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA) and WPA2. *WPA2 is a product certification issued by the WiFi Alliance. It uses a stronger encryption than WPA and is also backward compatible with WPA adapters.

Wireless Network Disadvantage

Security issues The data transfer speed within the LAN can be slower than wired networks

Securing home network(2) Change the default SSID (service set Identifier)

The SSID is the name that is used to identify your network and is used by your access point or wireless router to establish an association. Establishing an association. Establishing an association means that a wireless client can join the network. The SSID can be up to 32 characters and should be changed often so hackers who have figured out your SSID will no longer have access to your home network.

Wired Network Disadvantages

The cable connections typically require the use of The cable connections typically require the use of specialized tools The cable installation can be labor intensive

Planning the Home Network(Home access)

The choice of wired or wireless technology will not affect home access. However, the wired network will offer the best data transfer speed internal to the network, but the wireless network offers the best choice for mobility

Planning the Home Network(Public access)

The choice of wired or wireless technology will not impact public access. The data rate for the connection to/from the ISP will be the limiting factor for the data transfer rate for public access.

USB port

This device has the USB type A connector on one end and an RJ-45 jack on the other. This device will support connections to both 10 and 100Mbps data networks

DSL modem

This device is used to make a broadband network connection from your home network to the ISP using the telephone line. Broadband access to the Internet is provided via the phone company or a separate ISP. The DSL connection requires the placement of filters on all telephone lines except the one going into the modem to prevent interference. Figure 1-23 provides an image of a DSL modem.

Planning the Home Network(data speed)

This will be determined by whether you chose to implement a wired or wireless home network. Wired networks offer the best data transfer rate inside the home network, up to 10Gbps. The best data transfer rates for a wireless home network can be obtained using 802.11n (Wireless-N) technology. This is the next generation of high-speed wireless connectivity providing data transfer rates up to 4 × 802.11g speeds (200+Mbps).

Stateful Packet Inspection (SPI)

Type of firewall that inspects incoming data packets to make sure they correspond to an outgoing request

Wireless Network Advantage

User mobility Simple installations No cables

Wired Network

Uses cables and connectors to establish the network connection

Wi-Fi

Wi-Fi Alliance—an organization that tests and certifies wireless equipment for compliance with the 802.11x standards

Securing home network(4) Turn off the SSID broadcast

Wireless systems broadcast the SSID so that the network can be easily identified as an available network *Hackers can use this information to possibly gain access to your network so it is a good idea to turn off the SSID broadcast. *The exception to this is in hotspots where public access is available. Please note, hotspots make it easy for the user to gain wireless access but hackers can also be on the same network so it is very important to have encryption turned on.

Router

a networking device used to connect two or more networks (e.g. your LAN and the Internet) using a single connection to your using a single connection to your Internet Service Provider (ISP). A modern home networking router can also contain a switch and a broadband modem.

Wireless-N Adapter

inserts into a notebook or laptop computer PC Card slot. The Wireless-N technology offers a data transfer speed that is faster than Wireless-G and is also compatible with both Wireless-B and Wireless-G technologies.

Broadband modem/gateway

this describes the device used to provide high-speed data access via your cable TV connection or via your telephone company's DSL connection. A gateway combines a modem and a router into one network box.

Cable Modem

this device is used to make a broadband network connection from your home network to the ISP. using the your cable TV connection. This set-up requires a splitter to separate the cable TV from the home network. Access to the Internet is typically provided by the cable TV service provider.

wireless router

this device uses RF to connect to the networking devices. A wireless router typically contains a router, switch, and a wireless access point and is probably the most common way to interconnect wireless LANs to the ISP.

network adapter

wired and wireless network adapters are available. The type of network adapter used in desktop computers is called the Network Interface Card - NIC. The NIC is inserted into a PCI slot on the computer's motherboard.