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Computer Network Security
Network security is any form of computer security dealing with multiple computers linked through a network. Questions about everything from firewalls to viruses to denial-of-service attacks belong here.
1,030 Questions
What ways that user can help strengthen security in a network?
- Do not run the computer with local administrator right
- Use strong password and never share it (lock the screen if you have to leave your pc).
- Change password afterwards if you are force to share it.
- Do not use the network for private matters.
- Use a secure VPN to encrypt your work while surfing the web and block attacks.
- Use a recommended anti-virus program such as Norton to block back-doors allowing access to your network from the outside.
- Do not use your network account for private affairs like Mailist, Facebook...etc.
- Do not mess around with antivirus and firewall set by the admin
- Always scan the USB stick after using it on other machines.
What operating system often used for server applications is a scaled-down version of unix?
This unenlightened question is found on many A+ certification exams, First, I will tell you the that they want. Then I will tell you why there is no correct .
The that they want you to write in is "Linux." This is in spite of the fact that Linux scales even higher than Unix and has more features, thereby making most Unix implementations the "scaled-down" operating system.
In order for something to be legally called a "version of Unix", it must undergo a rigorous certification process. No Linux distro has ever undergone this process, and so cannot be called a "version" of Unix. So then you would have to look at what certified Unix systems are commonly used in the server market. The only certified Unix systems still commonly used on the server market are Solaris 10, AIX and Mac OS X. All three of these systems scale very highly, which makes them unsuitable as an .
What are the potential risks for network security?
u may encounter some hackers slip in and watch ur privacy
and may need a tool
Which intermediary devices could be used to implement security between networks?
Security between networks is implemented in an intermediary device (a router or firewall appliance) at the perimeter of the network. The firewall function performed by this device permits only known, trusted data to access the network.
dcpromo /forceremoval forcibly remove AD from a Server.
After you use the dcpromo /forceremoval command, all the remaining metadata for the demoted DC is not deleted on the surviving domain controllers, and therefore you must manually remove it by using the NTDSUTIL command.
What is meant by network security?
Answer
Effective Network Security has many layers. It requires security features at the local level (on each individual computer, and on the network level. A network is group of computers that share a common connection and so therefore are on the same network. For example, every computer that connects and uses to your home wifi are on the same network.
A network is a a group of individuals like i said. Therefore, computers themselves must have anti-malware software installed and that software must be frequently updated. Malware that affects a network of computers usually infected one computer initially and then other computers on the network were infected.
Network security also use a firewall. Firewalls monitors which websites (specifically the severs that host them) send data to the computers on the computer. They also monitor the data computers send to websites. Every time you visit a website your computers sends data to a server and that server back to your computer. Network security is important because it protects Fortune 500 companies, government agencies and home networks.
Is there a need of physical security while using cryptography?
Yes. Decrypted or plain text - yet to be encrypted - messages need to be kept securely before they are encrypted and transmitted.
How is encryption commonly used?
Data encryption the process of scrambling stored or transmitted information so that it is unintelligible until it is unscrambled by the intended recipient. Historically, data encryption has been used primarily to protect diplomatic and military secrets from foreign governments. It is also now used increasingly by the financial industry to protect money transfers, by merchants to protect credit-card information in electronic commerce, and by corporations to secure sensitive communications of proprietary information.
All modern cryptography is based on the use of algorithms to scramble (encrypt) the original message, called plaintext, into unintelligible babble, called ciphertext. The operation of the algorithm requires the use of a key. Until 1976 the algorithms were symmetric, that is, the key used to encrypt the plaintext was the same as the key used to decrypt the ciphertext.
What are the Features of network security?
Network security features include:
-
Firewalls: Block unauthorized access. -
Intrusion Detection/Prevention Systems (IDS/IPS): Monitor and stop suspicious activity. -
Encryption: Secures data in transit. -
Access Control: Limits who can access the network. -
VPNs: Create secure remote connections. -
Anti-malware tools: Detect and block malicious software. -
Security policies: Define user behavior and device use rules. -
Network segmentation: Isolates parts of the network to limit breach impact.
These features work together to protect data and devices from threats.
What device is used to send data between two networks?
If the message is going between two different networks then it must be routed (this includes different subnets of the same network as well). Routing is done by a router as the device.
How can i reset Pronet PN-54WRT wireless router?
It should have a special little bottom to reset. If you press and hold for 5-35 seconds depending on particular router it will reset all settings to manufacture ones. If you have manual for the router, it's a good time to read it.
What kind of attacks are there in network security?
to name a few you have
main in the middle
denial of service
sql injection
reverse bind
bin shell
arp poisinging
route poising
dns poisoning
What are advantage of access control list?
An access control lists specifies the various users and what level of access they have. If you activate an access control list in a application, the various components of the application will be accessed based on the level of access permitted to them and the access level specified in the access control list for the currently logged in user.
Which two layers of the OSI model do NICs belong?
Primarily in the Physical (first) layer to be the transciever for the Line, but many cards
these days also have acceleration and cache MAC-IP addresses and and speed up
ARP requests and translation to IP Addresses which are at the Link (second) Level.
How do you find passwords to email addresses?
The whole point of a password is that it remains known only to the person who chose it for his or her own account. Once you start giving out your password, other people can interfere with your email - possibly deleting mail before you can read it, or sending out mail pretending to be you. It's not a good idea.
Any shared private key method - symmetric encryption.
Does not constitute mandatory changing of a cipher lock combination?
The computer network security does not constitute the mandatory changing of the cipher lock combination.
What are the three approaches to wireless security?
The three ways a wireless network can be secured and safe. First, by enabling WEP or WPA/WPA2 wireless security key or password on the router. Second, by enabling wireless MAC filter. And third, by disabling the SSID Broadcast of the router.
How can one ensure that they have firewall network security?
in order to ensure ones firewall network security one must first turn on the firewall settings on ones computer. However to be certain the firewall is effective there are a few basic checks one can do to give reassurance. most computer have a firewall setting that uses the internet to check automatically for updates. these updates should be installed regularly. it is also suggested in order to obtain the best protection that the firewall be operated in 'stealth mode'
Salami attack- This financial crime works by taking small amounts of money over an extended period. For the attacker to be successful, he must remove an amount so small that it will go unnoticed.
What is the difference between network security and web security?
There are so many different conflicting definitions about Information Security out there; however there are clear censuses amongst the field's professionals and leaders on the following definition writing by Michael Chahino (Managing Director of Network Operations and Information Security) and Jason Marchant (Chief Security Officer):
INFORMATION SECURITY is a discipline governing the framework for the continuous cycle of safeguarding information and ensuring related regulatory compliance.
- Discipline
• a branch of instruction and learning such as history, finance, economics
- Framework
• a frame or structure composed of parts fitted together documenting the methodology of incident identification, mitigation, and resolution much like the scientific method
- Cycle
• a series of processes that are repeated in a precise and deliberate manner
- Information
• electronic, printed, audible, visual, memorized
- Compliance
• ensuring that the institution is in compliance with applicable laws, regulations, and contractual agreements
Source(s):Chahino, Michael and Marchant, Jason (2010). Computer Security Institute (CSI) 2010 Annual Conference http://www.csiannual.com/
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Old answer: network security deals with protecting the network whilst information security deals with protecting the information transmitted over the network.
Hope you get some meaning from what I said.
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Information security solutions have focused on preventing external threats such as viruses, hackers and worms through perimeter solutions that include firewalls and antivirus software. While still aware of outside threats, companies are now coming to understand they can no longer ignore inside violations concerning data at rest. So information security and privacy is of atmost importance whether it is internal or external.
What is difference between switch bridge?
Switches and Bridges are pretty similar, both operate at the Data Link layer (just above Physical) and both can filter data so that only the appropriate segment or host receives a transmission. Both filter packets based on the physical address (AKA MAC - Media Access Control - address) of the sender/receiver although newer switches sometimes include the capabilities of a router and can forward data based on IP address (operating at the Network Layer) and are referred to as IP Switches. Often the desired results could be achieved using either a switch or a bridge but *in general* bridges are used to extend the distance capabilities of the network while minimizing overall traffic, and switches are used to primarily for their filtering capabilities to create multiple, smaller virtual LAN's out of one large LAN for easier management/administration (V-Lan's).
The main difference between them is --->
Bridge can connect only TWO networks/ LANs/ Hosts, means bridge has only TWO ports. While...
Switch can connect more than TWO networks/ LANs/ Hosts because switch has more than TWO ports.
Or you can say that a bridge with more than TWO ports is known as a Switch.
The IEEE specs define bridges... and those bridges have tons of ports, not just two. The difference bridge/switch is mainly marketing.
What are the most common tools used in network security management?
WFilter is an Internet filtering software that can help organizations to monitor and manage all Internet behaviors on their networks.You only need to install WFilter in one computer to monitor your whole network.
* Monitor and archive all Internet activities including web surfing, Email contents, chatting contents, transferred files and so on.
* Filter certain websites, emails, messengers and file transfers.
* Block P2P software, online stream, Internet games, stock software and others.
* Real time monitor of online messengers, web surfing, file transfers and all
Who offers network security courses?
Network security courses are offered at many educational institutions in nearly every country. They can be found in universities, colleges and targeted limited courses. Inquiring at a local institution is the best place to start.
