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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
What is the reason for using Gateway?
Gateway is internet term that is used to remove unnecessary traffic or load from internet.
How would you use kill to cause a server process to reread its configuration files?
# kill -HUP pid
where pid is the PID of the server process.
What is primacy latency effect?
The tendency to remember only the first and the last elements in a speech
The mobile node communicates with a similar agent on the user's home network, known as home agent, giving the home agent the care-of-addressof the mobile node; the care of address identifies the foreign agent's location.
ip address
What Is a wireless network that provides Internet connections to mobile computers and other devices?
Hot spot
Is a wireless network that provides Internet connections to mobile computers and other devices?
hotspot
the owner of the resource.
What instruments are needed in an apicoectomy setup?
Apecectomy is carried out to save the tooth in cases where root filling is unsuccessful or impossible. Initially an Xray is taken to view the infected apex.
1. Scalpal - initial incision into the gum
2. Periosteal elevator - to raise the flap of the gum
3. Straight handpiece and bur - cut into the bone to expose the infected apex
Now the apex is cut off
4. Mitchells Trimmer - to scrap out the infected tissue
Now the Root Canal Filling is checked and if necessary additional filling material is inserted usually GIC or ZOE (Retrograde Root Filling)
5. Suture Needle and Silk
6. Needle Holder or Spenser Wells Forceps
Can IP address192.168.0.101 be routed to the internet?
No. That address is an RFC1918 address.
There are sets of IP space reserved for private use. These ranges are 10.0.0.0/8; 172.16.0.0/12 192.168.0.0/24. Any address that fall within these ranges are by convention not routable on the internet.
Each address on the internet has to be unique. There are only 4,294,967,296 possible addresses theoretically possible with IPv4. That sounds like a lot, but with over 1 billion computers worldwide, and another billion expected by 2014, this is likely to be exhausted at some point in the not too distant future.
The solution to this problem is called NAT or Network Address Translation. Basically it allows you to create your own network (not directly on the internet), and then use one (or several) public addresses to communicate with the internet.
Since more then one person can have the same address (for example: 192.168.0.1) the addresses cannot know about each other on the internet, as they would conflict.
These addresses are kept as internal, and most routers (at least properly configured routers) on the internet will not pass such an address to the internet.
What are the bad things about social networking?
The negative things about social networking include:
- People get immediate gratification, and so, they come to expect immediacy in real life.
- When immediate gratification is withheld, many social networking users / participants react with a wide range of negative emotions.
- "Relationships" online are artificial but can seem real.
- When the "relationships" ("friends") fail to deliver in social networking, the other person can feel duped, fooled, betrayed, disillusioned.
- Online social networking is more time consuming than real life activities.
- There are no outside authorities to determine how long is spent in social networking. For example, people know how long a basketball game in real life will take to conclude. But time limits are missing online.
- It is much easier to get addicted to "friends" (although they are strangers), and to online games.
- Because "friends" online are really strangers, we can't know their true age, identity, intent, morals, etc.
- "Friends" online may encourage us to do things we normally would not do in real life - for example, send a photo to a stranger online.
- We may tell our secrets, not realizing the other person plans to use that information to exploit or harm.
- There is never "love" online between strangers.
- No matter how much you might "care" about someone online, when you are hurt or in trouble, it will ONLY be your real life friends and family who come to help you.
- We can find "quick info" on social networking sites-- but often that "info" is just opinions, not facts.
- Too many people reveal personal info and real life dramas, and play out those dramas online.
- It is really easy to get too involved with other people's "dramas". For example, we've all run into someone online who is making semi-threats about committing suicide. People might spend HOURS trying to "convince" the person to stay alive. BUT, smarter people just say, "I trust that you know how to keep yourself safe and if you are not safe, I know you will call 911."
- We may give out so much information about ourselves online that it is hard to clean up our messes later.
- There are people who troll forums just to learn personal information. Therefore, rather than being a "social" outlet, users must always be on guard.
What is the name of the connector used on a network cable?
UTP most commonly used network cable
Cat 5 and Cat 6 network cables (also called 10BaseT) use an RJ-45 connector. Older thinwire ethernet (10Base2) uses BNC coaxial connect. Original thickwire ethernet used a special thicker cable with a proprietary AUI connector. The old IBM Token Ring system also used its own special cabling and connectors.
How does the hop count limit alleviate RIP problems?
A Google search for the phrase
hop count limit rip problems
returns a link which says the following.
"The hop count limit helps RIP instability by limiting the number of times a message can be sent through the routers, thereby limiting the back and forth updating that may occur if part of a network goes down."
