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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
Do you need a router with a gateway 2 wire modem?
No, the modem is already a router itself. the 2wire is an AP (access point) for 802.11b and 802.11g wireless standards.
also it has 4 ports on the back for 4 wired devices.
The benefits of network are Increased efficiency, Improved communications, and lowered costs. Just imagine the pain of trying to send a letter, as compared to today, where communication is nearly instant.
Client/server describes the relationship between two computer programs in which one program, the client, makes a service request from another program, the server, which fulfills the request
In a network, the client/server model provides a convenient way to interconnect programs that are distributed across different locations.
Example: Your Web browser is a client program that requests services (the sending of Web pages or files) from a Web server.
The server is usually a central location where the processing takes place, although these
can co-exist at the same location.
How do you leave a message to another user of the same computer without using Internet or intra net?
If it is the same computer, then the users are presumably physically accessing the computer. The low-tech approach would be to use a post-it note.
Electronically, there are many ways to accomplish this. You might have a logon script that checks a certain file for information and then displays it on the screen for a user, you might schedule a task to be run at a certain time, etc.
What are the Weaknesses of computers?
The weaknesses of computers are that sometimes they overhead, (like any electronic), they can be hacked (even the most "secure" places..) they can lose data, crash down, get slow... Lots of stuff. :)
What is Challenges involved in establishing remote connection?
The challenges involved in remote connection are as mentioned below.
• Heterogeneity
• Openness
• Security
• Scalability
• Failure handling
• Concurrency
• Transparency
Heterogeneity
• Different networks, hardware, operating systems, programming languages, developers.
• We set up protocols to solve these heterogeneities.
• Middleware: a software layer that provides a programming abstraction as well as masking the heterogeneity.
• Mobile code: code that can be sent from one computer to another and run at the destination.
Openness
• The openness of DS is determined primarily by the degree to which new resource-sharing services can be added and be made available for use by a variety of client programs.
• Open systems are characterized by the fact that their key interfaces are published.
• Open DS are based on the provision of a uniform communication mechanism and published interfaces for access to shared resources.
• Open DS can be constrcted from heterogeneous hardware and software.
Security
• Security for information resources has three components:
- Confidentiality: protection against disclosure to unauthorized individuals.
- Integrity: protection against alteration or corruption.
- Availability: protection against interference with the means to access the resources.
• Two new security challenges:
- Denial of service attacks (DoS).
- Security of mobile code.
Scalability
• A system is described as scalable if it remains effective when there is a significant increase in the number of resources and the number of users.
• Challenges:
- Controlling the cost of resources or money.
- Controlling the performance loss.
- Preventing software resources from running out
- Avoiding preformance bottlenecks.
Failure handling
• When faults occur in hardware or software, programs may produce incorrect results or they may stop before they have completed the intended computation.
• Techniques for dealing with failures:
- Detecting failures
- Masking failures
- Tolerating failures
- Recovering form failures
- Redundancy
Concurrency
• There is a possibility that several clients will attempt to access a shared resource at the same time.
• Any object that represents a shared resource in a distributed system must be responsible for ensuring that operates correctly in a concurrent environment.
Transparency
• Transparency is defined as the concealment from the user and the application programmer of the separation of components in a distributed system, so that the system is perceived as a whole rather than as a collection of independent components.
• Eight forms of transparency:
- Access transparency
- Location transparency
- Concurrency transparency
- Replication transparency
- Failure transparency
- Mobility transparency
- Performance transparency
- Scaling transparency
Why is the OSI model useful in network design and assessment?
The OSI model is useful in network design and assessment because it makes network communications more manageable by dividing the processes up into smaller parts. The processes are broken up into 7 layers and each layer serves the one above it.
What is the name behind this number 61.23.41.82?
The server for that IP address is located in Tokyo, Japan.
The address of the ISP is: AtHome Japan Network Operations Centre
@Home Network Japan
4-7-1, Aobadai,Meguro-ku
Tokyo,Japan,153-0042
phone: +81-3-5452-3820
fax-no: +81-3-5452-3821
e-mail: noc@nethome.jp
For reports of network abuse, pls. contact abuse@home.ne.jp
PC organization is keeps your computer organized. This includes, but is not limited to:
1. trashing old files
2. cleaning the drive
a: removing unused folders
b: freeing space
3. tidying up the hard drive and desktop by removing unused items
4. remove programs that are unused
Define controlled access and list three protocols in this category?
In controlled access, the stations consult one another to find which station has the right to send. A station cannot send unless it has been authorized by other stations. There are 3 protocols
>reservation
>polling
>token passing
What command to request a IP address?
If you mean your own internal address, at the command prompt, type "ipconfig"
For most users, your public IP address will change but is normally different to your local address.
Typically, your local address is a private address that others can't see.
What is the process of encoding information in a way so that only someone with a key can decode it?
Encryption is the answer
This is a cross-over cable. But specifically, the orange and green pairs are only affected with relation to pin changes.
How old do you have to use a Peer to Peer network?
There is no age restriction to use the network.
Although most chat rooms require you to be 18 or 21 years of age.
Where can one learn how to use remote desktop connections?
There are many ways to learn how to use remote desktop connections dependant on the level of proficiency you wish to gain. For advanced uses a course concerning remote desktop connections, among other things, will be available at a local college or school. However, for simple uses a simple WikiHow document maybe sufficient to teach you the basics.
What is the different between ip and tcp?
Ip is the protocol that figures out how to get data to a certain location on the network.
TCP is the protocol that breaks the data down and gets it ready to be transported. And then again on the other computer, TCP is what builds up the data into its original format before it got broken down by TCP on the first computer.
No you will have to use one or the other. In order to use more devices you will have to install a router to your modem.
AnswerIt depends on the modem, some will let you use both ports simultaneously, while others won't. If you do have a modem that will run both, your ISP (cable/dsl company) will usually charge you a fee between $3.00 to $10.00 for accessing more then one dynamic/static IP, one for each port on the modem. So again your best bet is to get a router.
AnswerConnect one to the the Net then use windows internet sharing system ISS to share the link betwen the two systems. Use a wireless 802.3 connection or a second NIC on the ISS system to the cable modem and then connect the USB computer and "bridge" or ISS the two sub nets together witout a router!
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Answer
Yes, I try this on my server & client PC's is this possible.when we connect one modem on two PC at same time it work, but when we connect two interface at one PC of separated two lan how can configure that?
It is possible to use two default getway on single PC?
What is a Zero Slot LAN and Its Advantages Disadvantages?
A zero-slot LAN is a local-area network (LAN) that uses existing serial and/or parallel communication ports on the computers in the network instead of requiring network interface cards (NICs) that would occupy an expansion slot.
Advantages
It leads to transmitting between computers over a serial or parallel port, thus freeing up an expansion slot normally used by LAN cards (NICs).
Disadvantages
Zero-slot LANs are typically slower than LANS that use NICs and are limited to two or three network nodes.
