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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
A file server is a dedicated server that what?
Serves files. as opposed to a web page server which serves web pages. Generally a file server is something that you would have at a company, it would probably hold all of your important files which need to be shared with your team, it might also host your companies intranet.
What are the disadvantages of using the same password for all networks?
I can think of two disadvantages right off:
1) The biggest one is that if someone compromises the password on one network it is compromised on ALL the networks. Hackers will often exploit this by attacking a less secure network to harvest passwords and then try them on more secure networks that the users also use
2) The other disadvantage is that if you forget the password you have now locked yourself out of all the networks. Somehow I don't see this as very likely though.
There are several questions here so there is more than one answer:
Connecting fiber to coaxial cable
Fiber optic cable transmits light and not electricity so there is no way to connect the two together directly. Interfaces can be used to take data in an electrical form, convert it to light and send it along a fiber. Similar interfaces do the opposite and receive light to convert it back to an electrical signal. The type of data carried is independent of the fiber or the cable.
Picture quality
In the world of television, data means pictures (and audio and other data). Television transmission is now almost fully digital in most countries so both copper cable and fiber doth carry digital information. As the data is independent of the transmission method, there will be absolutely no difference in picture quality if it is transmitted over fiber or copper.
Data speed
Few of us have the luxury of specifying the type of connection we have to the Internet. A service provider will supply copper cable or fiber to suit their own systems and then provide a suitable interface in the home. Fiber is often used for long distance connections with a short copper link from the street into homes or fiber can be taken directly into a home. Either way, the data rate is specified and controlled by the service provider. Fiber has a reputation for offering better maximum data rates than copper cable but this is dependent on the length of the line being used. In general terms, copper cable can transmit data as fast as fiber optics over very short distances. Above certain lengths, fiber optic cables become very attractive compared to copper because the signal losses are far lower in fiber than copper. It is safe to say that for long runs, fiber can offer a higher data rate than copper in many situations.
Go in the printer's properties and choose share printer. In allowed users choose "Everyone". If you want everything works without problems you need to set all computers going to share the printer to the same workgroup.
That should be a router.
2 How do routers use the routing table to determine the best path to a destination network?
They check the number of hops a packet passes to reach the the destination. The router then uses the route with least number of Hops.
TELNET
Is cisco vic2-4fxo hot swappable?
No. You're supposed to power off the router before swapping vic2 cards. Hot swapping the card can cause damage to the router or card. I actually tried this once to see what would happen, luckily neither the router or card were damaged, but the card was not recognized until the router was rebooted.
What is the difference in distance between lan and wan?
A LAN (local area network) is a group of computers and network devices connected together, usually within the same building
A WAN (wide area network), is not restricted to a geographical location, although it might be confined within the bounds of a state or country. A WAN connects several LANs, and may be limited to an enterprise (a corporation or an organization) or accessible to the public. The technology is high speed and relatively expensive. The Internet is an example of a worldwide public WAN.
Lastly, the protocols are different between a LAN and WAN. A LAN uses transmissions to other devices within the same network segment, whereas a WAN uses point to point transmissions between nodes of the WAN which may be separated by hundreds or thousands of miles.
workgroup
Two routers need to be configured within a single OSPF area. Which two components need to be configured on both routers to achieve this?
1 What is the defining difference between computer security and information security?
Where computer security deals with the processes applied to computer system(s), information security concerns all of the aspects regarding the system of policies and/or procedures for identifying, controlling, and protecting information from unauthorized disclosure. While often synonymous, information security is actually a superset of computer security, encompassing the fields of data security, transmission security, network security, physical security, personal security, and personnel security,
You cannot ping pfsense fom your wan network?
Add a firewall rule to allow ICMP from WAN.
Firewall | Rules | Add
Action - Pass
Interface - WAN
Protocol - ICMP
ICMP type - Any (or echo reply)
Source - Any
If your WAN is a private subnet, you will need to disable block private networks on the Interfaces | WAN page
What is the first generation security standard wireless network?
That is WEP (Wired Equivalent Privacy)
How connection is established between circuit switching and packet switching?
Simply in a circuit switched application all the data travels over a predefined path end to end. In a packet switched application the data is broken up into packets and may go over different paths and is reassembles at the destination. Imagine a train consisting of a number of cars traveling from point A to point B with data being represented by the content of each car. This would be a circuit switched example. If we took the same contents on the train and put it in trucks containers and told the drivers to go whatever way they wanted to the destination then this would be packet switched.
