Computer Networking

A hub is a repeater reading electronic signals from a cable and replicating them on all other interfaces (broadcast).

a switch operates at Layer 2 of the OSI model forwarding frames to their destination/next hop only (rather than to every address connected like a hub).

Switches facilitate simulcast (1 to 1), Multicast (1 to many) and broadcast (1 to all).

tftp

snmp

nfs

Output ports can transmit only a single packet in a unit of time (the packet transmission time), the arriving packets will have to queue for transmission over the outgoing link. There could be more packets arriving from the switching fabric at the output port while the output port is still working on sending the packets that are already on the queue. Eventually, the number of queued packets can grow large enough to exhaust the memory space at the output port, in which case packets are dropped or lost.

Yes, but with limits. If you find someone's IP address, you can go to whatismyipaddress.com and find which city, state, and country that person lives in. You can also see which company their internet is. However, they cannot see details such as the person's name, address, ect. If you are worried about this, you shouldn't be. I was once deathly afraid of stalkers, but I realized, they can't do anything to you unless you let them. If you tell the police, everything will be fine, and the chances of them actually coming into your house are very slim, and it won't happen as long as you have a good security system and other people living with you.

traceroute

The mac address is the PHYSICAL address of your network card. Each network card is manufactured with a unique address which distinguishes it from every other network card in the world. If you're using Windows XP, open a command prompt and type:

ipconfig /all

About half way down you'll see

"physical address . . . . . . . . xx-xx-xx-xx-xx-xx"

That's your mac address. If you were to look at your network card, that's also the physical address that would be on the label.

Waves of very low frequency are not used for data transmission in computer networks because they may attenuate and fail to transmit data. However, sometimes such low frequency waves may be used if repeaters are installed along the transmission route.

It depends on your additional certifications. Usually someone that has a CCNA certification, has other prerequisite certs. Usually some basic networking and or hardware, such as A+ (hardware) or N+ (basic networking). It doesnt hurt to also have some Microsoft certifications as well, such as MCP, MCSA and MCSE. Experience is also a very good thing on your resume. Employers love that.

Possibly an entrance position would be desktop help. Its a great place to get experience.

Binary can only be 1 & 0. Decimal numbers have a dot in them.

Binary numbers use only 2 symbols (0 and 1) to represent different numbers, while decimal numbers use 10 symbols (0 to 9) to represent different numbers. check the below link for more.

Seems to me, I'm still learning, that the Class D subnet mask would be 224.0.0.0 or 1110 0000.0000 0000.0000 0000.0000 0000 in binary. The Internet has been using classless subnets for a while now, so it may not be as relevant as it once was.

Holding users files.

Installation.

Personal computers (PC) have a large number of ports to which you could add you own hardware to control your robot. Some of these are very easy to use, while others are nearly impossible without special (expensive) ICs. Not all of these interfaces are available on all computers. This section gives an overview of some of the best known ports on a PC. These ports and their uses are well document all over the internet.

For more information visit the Related Link.

You can run multi mode fiber approximately 3000 feet before you start noticing transmission errors.

Nothing. That is not a valid IP address as its stands however ip addresses with the first 2 octets of 169.254.xxx.xxx means that Automatic Private IP Addressing has been enabled because no DHCP server was found and no static address has been defined.

Low interference, high frequency bandwidth and something else... The main advantages of coaxial cable are # Good shielding. This almost eliminates interference from external electromagnetic fields; it also reduces radiation from the cable to almost zero. Only a waveguide is superior in this respect, and that can be used only in the microwave region. # Good bandwidth and low loss. These two are grouped together because they enter into a three-way relationship with cost. One can extend frequency response right into the microwave region, and achieve lower and lower loss figures; you just have to pay for it. Again, waveguide can better microwave performance and loss figures, but at high cost in weight as well as money. # Good power handling. # Flexibility. Co-ax can go round corners without any problems. Most other transmission lines have problems with a change in direction. # A characteristic impedance which is known, uniform all along the cable and stays the same when the cable is curved. # Can be run anywhere without being affected by its surroundings; it can be run underground or underwater provided it has a "non-contaminating" outer jacket.

To find the Network ID and Host ID from an IP address you need to use a Subnet Mask. The address 220.43.6.8 is a class C IP address (Since the range of Class C address is 192.0.0.0 to 223.255.255.255).
The standard default mask for class C is 255.255.255.0


Network address = (IP address) Boolean AND (Subnet mask)
Hence,
network address = 220.43.6.8 AND 255.255.255.0 = 220.43.6
(since 255 means all 1s in binary, hence it'll give the same bits which are ANDed with it, whereas 0 means all 0s in binary, hence it'll give answer as 0 irrespective of what bits are ANDed with it)


Hence Host Address would be the remaining part of IP address = 8

The source MAC address within a frame is used by the switch to associate a port with that MAC address.

Frames are directed by the switch from one port to another based on the destination MAC address within the frame.

RDP. Remote desktop protocol in Microsoft systems. Also known as terminal services on port 3389.

Yes - the first bits specify the network, the remaining bits, a host within a network. There is no fixed number of bits for the network; this may vary.

Yes - the first bits specify the network, the remaining bits, a host within a network. There is no fixed number of bits for the network; this may vary.

Yes - the first bits specify the network, the remaining bits, a host within a network. There is no fixed number of bits for the network; this may vary.

Yes - the first bits specify the network, the remaining bits, a host within a network. There is no fixed number of bits for the network; this may vary.

• forces the retransmission of unacknowledged packets
• carries the IP address of the destination host in the TCP header
• is responsible for breaking messages into segments and reassembling them at their destination

To extend a network, Ethernet cable splitters, hubs, and network switches can all be used. Each of these devices has its own set of advantages and disadvantages. We'll go into how each of these useful tools works, how they vary from one another, and how to use them effectively in this guide.

Mesh networking is a type of network in which each node relays data for the network. This type of network is very reliable because it does not have a single point of failure. Mesh networks are also very scalable because they can be easily expanded as needed. One disadvantage of mesh networking is that it can be more expensive to set up and maintain than other types of networks.

There's all kinds of organisations around the world, that enable people around the world the internet.

If its the case for me, the organisation that enables my internet, is TEO.