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Computer Networking
Computer networks are collections of computers which are connected together in order to communicate and transfer information. Questions about computer networks, networking protocols, and how to set them up belong here.
18,810 Questions
Start->Run->cmd, press enter. In the cmd window type ipconfig and press enter. You will see all required information for all network adapters connected to your computer.
Where should the user look to find a server attached to the network?
A user in a large manufacturing company uses a PC that is connected to the company network. Where should the user look to find a server attached to the network?
How does a hacker hide their online identity?
Top 15 tips that hackers consider them as survival tips
Never Disclose your Identity:
Never tell any body that you are a hacker even your friends or your relatives you must keep it a secret
Use Proxy:
Never hack without a proxy
Be Careful:
Never let FBI enter your house without a search warrant.
Never Hack from your home:
Never hack from your home always use net cafe for these purposes
Always:
Wave to cops
Use Fake information:
Never use your real name in any sort of conversation or in any signup
Never keep weak passwords:
Do not keep a password which is already present in the dictionary or a password which is very common
etc your pet name your country name etc
Password tip:
Don't use same password twice for maximum security
Of course:
Never hack from the same computer twice if possible
Hide yourIP:
Hide your ip address to avoid your chances of being traced
Use Firewall:
Always use a Good firewall such as zonealram
Change your Ip:
Change your Ip address daily if possible
Use fake information while signing up:
Don't enter your personal information eg your address your number etc while
Using social networking sites like orkut, facebook etc
Most importantly:
Always have a panic button that mass deletes your questionable content
OF course:
Never let the FBI in period.
Yet again:
Always use a Proxy when doing anything remotely illegal
Explain the difference between a network IP address and a network prefix?
In either IPv4 or IPv6, a network address is the first address in the network IP range. It has all zeroes in the host field, when written in binary. It cannot be assigned to a host device. It appears in a router's routing table to identify the network. For example:
O 148.43.200.80/28 [110/586] via 148.43.200.30, 00:03:07, Serial0/0/0
This shows that network 148.43.200.80 is reachable out interface s0/0/0. It is a /28 network, meaning 16 total IPv4 addresses. 148.43.200.80 is the first one, "the network address," and as said before, can't be assigned to a host device. This network would extend to 148.43.200 95, which would be the broadcast address for the network (all 1s in the binary host field), and also can't be assigned to a host.
All the addresses in the network share the network prefix. It is simply the network portion of the address, in binary. Since these are /28 addresses, the network prefix is 28 bits long...the first 28 bits of the 32 bit address. For these addresses in the example network, the network prefix is (in bold):
10010100.00101011.10001000.01010000. The remaining four bita at the end are the host bits, or host field, or host number (all the same thing).
People will write this network prefix like so: 148.43.200.80 /28. Now 148.43.200.80 is the network address, so it's easy to see where the confusion comes from. You pretty much have to understand from context whether they're talking about the network prefix or the network address.
Some people will refer to the CIDR prefix...the /28...just as the prefix, or even the network prefix, but it really is just a way to represent the subnet masking. It says that the first 28 bits of the address in question are the network bits, and will be identical for any IP in this network.
You could argue that something like an iPhone is a computer. It has an internal processor and memory as well as a display screen and input screen. It is run by software that people can hack. You can download "apps" (which are computer programs) and if you know how you can even write your own apps. Apple advertises that you can do everything from calculating tips to printing out shipping labels. They are basically pushing it as a tiny computer with sophisticated wireless communications capabilities.
In fact, the iPhone is more powerful than a computer the size of a refrigerator was about twenty years ago. It has more computing power, more storage, and more sophisticated interfaces.
Of course, every cell phone has one or more microprocessors built into it just to perform basic calling functions. But as more and more functions are added to even basic phones, the lines are blurring and the answer to your question depends on how you want to define the word "computer."
What ATM layer has no equivalent layer in the OSI reference model?
ATM consists of 3 layers AAL (adoption layer) ATM layer (similar to DataLink layer) and Physical layer. AAL layer has no equivalent in the OSI model.
How canbe connected two computer without LAN connection?
Sure! IP (Internet Protocol) is simply the most common addressing scheme in use today.
Imagine you and one or more friends are exchanging postal letters. In order for your letter to be delivered, the envelope must have a destination address and in order for your friend(s) to reply, it must have a return address. Inside the envelope it is your letter itself.
This is precisely the way computer communications works. The computers exchange data packets ("letters") and each packet has an address ("address") in it's header ("envelope") that indicates where it's going and one that shows where it's coming from.
Just as the post office can't deliver a letter to your friend without the address, a computer cannot exchange packets without addresses. But so long as the computers involved are all using the same method to uniquely identify themselves, be it an IP address, NetBIOS name, MAC ID or other scheme, they can communicate.
It depends on how it's set up. If the wireless router is connected directly to the service, you should be able to connect the laptop without the desktop being turned on. If the desktop is connecte directly to the service and the router feeds from the desktop... no, you'll need the desktop to be running. No Its Doesn't.
You Just Need A Modem To Be Connected To The Desktop Computers Ethernet Port
How can you assign multiple static IP address to one router?
You just need to have multiple static ip addresses provisioned to you by your ISP and then have a router whose software is capable of handling it. Every windows XP computer can have multiple static ip addresses, and I use a version of Linux called coyote Linux for my router, which supports three static ip addresses and even allows port forwarding based on which public ip address the traffic is coming in on. I'm pretty sure most basic routers sold in stores don't have this capability and you would need a pricier, more advanced model. But Coyote Linux is free. Just fyi.
Explain the five components of Data Communication System?
The five components are : 1. Message - It is the information to be communicated. Popular forms of information include text, pictures, audio, video etc. 2. Sender - It is the device which sends the data messages. It can be a computer, workstation, telephone handset etc. 3. Receiver - It is the device which receives the data messages. It can be a computer, workstation, telephone handset etc. 4. Transmission Medium - It is the physical path by which a message travels from sender to receiver. Some examples include twisted-pair wire, coaxial cable, radiowaves etc. 5. Protocol - It is a set of rules that governs the data communications. It represents an agreement between the communicating devices. Without a protocol, two devices may be connected but not communicating.
The denied MAC address are statically configured on the port
What type of firewall is zone labs?
Zone Labs is not a firewall, it is/was a software company that developed and marketed ZoneAlarm, a freeware security program that includes a web and local network personal firewall with outbound program control and port stealthing. It includes an inbound intrusion detection system, as well as the ability to control which programs can create outbound connections.
The Zone Labs Company was acquired by Check Point Software Technologies Ltd in March 2004. With the acquisition commencing on 15th December 2003 and being finalised in March 2004.
Currently protecting more than 80 million users and with the release of the newest version of the program ZoneAlarm Extreme Security 2013 in November 2012, ZoneAlarm® products remain among the most trusted brands in Internet security currently available.
The various versions of this software and a description of their features are listed below.
· ZoneAlarm Free Firewall: A freeware version that includes a web and local network personal firewall with outbound program control and port stealthing. It is distributed through Download.com.
· ZoneAlarm Free Antivirus + Firewall: A freeware version that includes an award-winning Two-Way Firewall, Advanced Firewall, Advanced Download Protection, and Identity Protection, and antivirus protection provided by Kaspersky Labs.
· ZoneAlarm Pro Firewall: This offers an OS Firewall identity protection, pop-up blocker, adware detection, cookie blocker. It does not have Antivirus features.
· ZoneAlarm Pro Antivirus + Firewall: Includes ZoneAlarm firewall, Advanced Download Protection, and antivirus protection provided by Kaspersky Labs.
· ZoneAlarm Internet Security Suite: Includes all the features of every product with additional IM security and an anti-spam filter engine provided by MailFrontier and a parental control. It is the most expensive ZoneAlarm product. It is now given out freely with TrialPay.
· ZoneAlarm Extreme Security: A comprehensive version that includes all the features of all other versions plus ForceField and computer optimization and data backup tools.
What is unicasting and multicasting?
The terms Unicasting and Multicasting are used in computer networks.
By Unicasting we mean that the communication is a One-to-One communication,ie. one computer interacts with just one other computer.
by multicasting we mean that it is a One-to-Many communication.ie the computer interacts with more than one computer on the network.
Why the CPU execute faster than the input and output device?
The CPU is incredibly fast at executing data. The only problem is getting data to the CPU.
This arduous task is carried out by the various buses -
The control bus is a line which the CPU sends information about what device it wishes to communicate with
The data bus carries the actual data
The address bus carries memory locations.
This means that the I/O device has to do the following:
1. Inform the CPU that it wishes to talk. (It does this via IRQ [Interrupt Request] channels)
2. The CPU will inform the device that it is ready to talk through the Control bus.
3. The device will set its' ready signal to 0, meaning that it is sending data, then it will put the data on the data bus.
4. The CPU will receive the data, storing it in registers.
5. The device, once it has finished, will set the ready line to 1.
6. The CPU will read and execute the data, performing whatever is necessary.
7. The CPU will inform the device that it has finished
8. Then, if necessary, the CPU will pass any data back along the data bus, setting the data bus ready line to 0.
The main drawback is this: Only one device may use these buses at any one time. The CPU is far faster at doing the actual execution than it is to actually get all of the necessary instructions to the CPU.
I hope that answered your question.
Is a device that manages traffic between two networks?
Most of the time you use a router between two networks. You can also use a bridge but bridges are most likely software based. Routers are hardware based or "appliances".
What does email look like and name one advantage?
An email contains the sender's email address/name and the recipient's address and name. Then there is the actual message from the sender.
One of the advantages of email is that its much quicker than normal paper mail.
How do you request an IP address from a DHCP server in Linux?
1. dhclient -r
This releases the current IP address lease
2. dhclient
This requests a new IP address.
Switched Ethernet
It depends on how the DHCP server scope options are configured. At a minimum, DHCP uses supplies the following:
- Adaptor IP Address
- Subnet mask
- Default Gateway
- Primary/secondary DNS server addresses
It might also supply some other routing options, including WINS server addresses, etc.
Why do you setup default gateway server address?
First, you have to know what the default gateway address for your LAN segment is. This might mean talking to your network administrator.
Usually this address is set automatically by the DHCP protocol, so you don't need to do anything. If you are using a set of static addresses, then you can specify the default gateway address in one of the Windows network dialog boxes. For Unix/Linux, the 'ifconfig' command allows you to set the default gateway address.
For server 2008 (including Server 2008 Core) use the netsh command to set the default gateway address (if not using DHCP).
