Computer Networking

yes DHCP require the authorization of the dhcp server before IP addresses can be allocated because until we authorize DHCP server the network does not know who is the dhcp server for the subnet. The DHCP server broadcasts the information to all.

No DNS is based on the hirearchal system not NetBIOS.

Men

Use subnetting to break up the broadcast domain, as well as improve manageability. Also subnets will improve bandwidth usage.

255.255.252.0

MAC address filter is a pretty secure way of rudimentary network security. Enabling it makes the network available only to know devices. However, this leaves it vulnerable to MAC address spoofing.

yes

HDMI cables are limited in length. Finding a cable more than ten meters or thirty feet can be difficult and they are expensive. One of the methods to overcome the cable length limitation is to use CAT5 or CAT6 cable. An HDMI signal can be converted to run over two separate network cables with minimal signal processing and over a single network cable with more extensive signal processing. A sender and a receiver are required and can be found under headings such as "HDMI over CAT5 CAT6" for example.

With extenders of this type, the maximum cable length can be increased to as much as 50 meters or 150 feet. Check the specification on each product to make sure the maximum length is sufficient. Be aware that these extenders make use of network cables but they should not ever be connected to a local area network. They do not operate as part of a data network.

A note of caution: HDMI senders demand a high data rate and therefore they demand CAT5 or CAT6 cables that are truly compliant with the standards set out for the cables. There are many cables available on auction and trading sites at a low cost that do not comply with the CAT5 or CAT6 standards. In fact, many fail the tests in a spectacular fashion. As network devices are able to negotiate data rates to handle poor cable performance, non-compliant cables are often not noticed. Use an HDMI extender and they will simply stop the signal being delivered. It is vital that the cables are sourced from a trusted supplier to avoid this problem.

Ok good question

To subnet any network requires borrowing host addresses

The 255.255.192.0 regardless of class says host addresses start at CIDR (Classless Inter Domain Routing Protocol) /18. So if we borrow every available host address space then we have 2^14 = 16,384 possible subnet addresses available, NOT.

In reality we have 11111111.11111111.11000000.00000000 or a /18 network.

Every network / subnet requires two special reserved addresses. The network or zero address, and the last address in the range which will be assigned as the broadcast address.

So we can't borrow all of the bits for sub netting. If we only leave one we will only have two addresses for the hosts, this won't work because we need to reserve two.

We have to leave two so we will have 2^2 = 4. We can then give each subnet a network address and a broadcast address and still have 2 usable hosts' addresses. If we do this we only have 2^12 subnets = 4096.

Each subnet will only have two usable host addresses and two reserved addresses. See the math confirms that 4096 * 4 = 16384 which is the total number of addresses in the address space we started with.

form_title=Network Adapter form_header=There might be a problem with your network adapter if you are unable to connect to a network. How many computers are currently assigned to your network?*= {1,2,3,4,5,6,7,8,9,100, more than 100} Have you tried reseting your adapter?*= () Yes () No When would you like this service request to be completed?*= {Within 1 week, 1 to 2 weeks, Longer than 2 weeks, Timing is flexible} What problem(s) are you having with your network adapter?*= _Please Explain[100]

The difference can be quite different or quite similar depending on the context by which both are used. If your speaking IT then theres some bit of similarity but a bit of difference also as they both fall under each other. Networks are multiple computers or devices that interconnectable and capable of speaking with each other in a general area. The term networking describes more the act or occupation of assembling, configuring and troubleshooting a network of devices or computer so as they are able to speak with eacother.

Add the RRAS computer to the appropriate group:

1. Log on to your computer with an account that has administrator privileges on the Windows 2000 domain.

2. Launch the Active Directory Users and Computers MMC snap-in, and then double-click the domain name.

3. Double-click the Users folder, and then double-click the RAS and IAS Servers security group.

4. Select the members tab.

5. Add the RRAS server to this group.

If the organization has more than one domain in the forest, and users from the different domains are trying to log on to the RRAS server, continue to follow steps 1 through 5 until the RRAS server is in the "RAS and IAS Servers" security group for each respective domain.

Use the Netsh.exe Utility

The Netsh.exe methods can only be used if the RRAS server is Windows 2000-based.

Use either of the following methods with the Netsh.exe tool:

1

Log on the RRAS computer using an account that has domain administrator privileges, type netsh ras add registered server at a command prompt, and then press ENTER.

2

To run a command with administrator privileges without being logged in as an administrator:

1. At a command prompt on the RRAS computer, type runas /user:domain name\administrator name "cmd", where domain name is the appropriate domain name, and administrator name is the appropriate administrator name. You are then prompted to enter a password for this account. If this computer is able to connect to the domain controller and verify the credentials, a command prompt opens with the following information in the title bar:

cmd (running as domain name\administrator name)

2. At a command prompt, type netsh ras add registeredserver at a command prompt, and then press ENTER.

There is no such thing such as a PBX department. But maybe you can classify a telephony communication system such as a PBX system into a separate department.

Check these links to find more information:

unifiedcommunic.livejournal.com/6225.html

en.wikipedia.org/wiki/Private_branch_exchange

You need to change the network card in your computer with a wireless one, and buy a wireless router.

Need 2 items:

wireless router

wireless network card

RIP is a protocol used by routers to exchange information about their routing tables. In dynamic routing, a router learns from other routers about possible routes by advertising what they know. RIP is a protocol that can do that.

You need an Ethernet hub. Connect your modem and both computers to the hub, and both of your computers will have a connection available.

The OS's only affect the connection settings on each computer.

Cut-off and saturation

media converter

A router is a device that routes all traffic to and from your network. A router functions by forwarding packets of data between computer networks.

Local Area Network and Wide Area Network.

Yes.

If you are emplyed by a company to teach IT then no. You only need there requirements witch is usually a certification like for Microsoft you need a MCT (Microsoft certified Trainer).

If you are starting your own school or teaching site then you just need a buisness licence and the certifications

Often it is the server that is hosting the DHCP, so it can not assign its own address. But usually its just useful if the servers always have the same IP address. For example if a server is hosting a DNS server (as company servers often do), and all the workstations in the company are looking to that IP address for DNS info, the IP addrss can not change. If the IP address of the DNS server were to change then no computers on the network would be able to resolve domain names.