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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
How to solve Transfer problems between primary and secondary zones in Windows 2000?
Usually this is related to network connectivity issues, so check that the systems can talk to each other first.
What are the characteristics of the advance symmetric block cipher?
Some characteristics of an Advanced Symmetric Block Cipher are key dependent S-boxes, data dependent rotation, variable plaintext or ciphertext block length, and operations on both plain and ciphered data.
Technical - These controls audit and journal integrity validations, such as checksums, authentication, and file system permissions.
Administrative - policies, procedures, guidelines, etc.
Operational - These are day-to-day procedures, mechanisms that include physical and environmental protection, privileged entry commands, change control management, hardware controls, and input and output controls.
Also:
Management - These control personnel screening, separation of duties, rotation of duties, and least privilege. These can be either Administrative or Operational but are more commonly Administrative.
Physical - Control physical access to facilities and resources, e.g. gates, guards, fences, walls, locks, lighting, video surveillance, etc. These are more often Operational although they are sometimes also Administrative.
Is it good practice to include the account or username in the password why or why not?
It is not a good idea - most password cracking programs will insert the account as part of the attempt to crack the password.
Explain how security risks can be minimised in a network?
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Run as a limited user
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Have anti-virus and firewall protection
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Make sure your computer has all the latest updates
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Hide IP address
I would give you more but if you research it you will learn yourself, DONT COPY AND PASTE you learn f'all.
As A Networking Administrator what are the daily responsibilities in Active Directory Services?
Active Directory contains information about the resources of a domain, usually available via a network. Therefore the duties and responsibilities would be for creation and maintenance of passwords, group policies of the domain, group membership of users, and other duties of that nature.
2) AS A NETWORK ADMIN, YOU SHOULD CHECK REPLICATION BETWEEN SERVERS IS HAPPENING PROPERLY OR NOT
What properties must a hash function have to be useful for message authentication?
To be useful for a message authentication, the hash functions must have the following properties –
• H can be applied to a block of data of any size
• H produces a fixed-length output
• H(x) is easy to compute for any given x, making both hardware and software implementations practical.
• For any given code h, it is computationally infeasible to find x such that H(x) = h. A hash function with this property is referred to as one-way or pre-image resistant.
• For any given block x, it is computationally infeasible to find y ≠ x with H(y) = H(x). A hash function with this property is referred to as second pre-image resistant. This is sometimes referred to as weak collision resistant.
• It is computationally infeasible to find any pair (x, y) such that H(x) = H(y). A hash function with this property is referred to as collision resistant. This is sometimes referred to as strong collision resistant.
What does a layer 2 switch use to decide where to forward a received frame?
A layer 2 switch uses the MAC address to determine which port to switch the frame out of.
The 2 security methods used on network?
There are two types of network security concerns: network infrastructure security and content security.
Securing a network infrastructure includes the physical securing of devices that provide network connectivity and preventing unauthorized access to the management software that resides on them.
Content security refers to protecting the information contained within the packets being transmitted over the network and the information stored on network attached devices.
What is the job description of a system administrator?
they do stuff like ere wellu know
A Job Description clearly describes what is the necessity actually. You can find few samples Job Descriptions here Administrator Job Description
What enables users of an unsecured public network to securely and privately exchange data?
There is some software you can get for such purpose. The fast commercial solution was and is VPN connection. If your company does not have it, you can purchase it. If you are asking about free software, I know that a new release of Comodo firewall has a module allowing to protect your data in private networks making it harder for attacks to intercept data from your computer to the gateway.
What network security tools are useful when an audit is imminent in a small company?
The network security tools that you should have in place include firewalls, proxy servers, encryption, logical security and access controls, anti-virus software and log management tools. It is also vital to make sure that everything has been updated to the most current versions available ensure network security.
It depends on what kind of network configuration you are going to choose. If you want to have just to routers with independent DHCP servers, you are good to go. If you want to create "bridge" configuration, I might have serious problems. It's well known that routers from different companies do not work well in the "bridge". When they do it's rather an exception.
Does deleting history in Microsoft Security Essentials delete the virus or just the history of it?
It just deletes the history of the fact the virus was on your system.
What server role is used to manage security tokens and security services for a web based network?
Active Directory Federation Services is used to manage security tokens and security services on a Windows Server 2008 Web-based network.
How expensive would an Access Control Security System be at ADT?
An Access Control Security System will cost as low as ninety-nine dollars at ADT. If you would want a Access Control Security System you can call 800-204-3646.
Not enough information to answer this question - need information about the network you are on (if the same), speed of the links, type of server, and how much information you want to transfer.
Definition of encryption in network security?
Encryption is to trasform the data into the coded form..like password or securty key n if u want to read dat then u must hv to access on dat coded key..
- it is also a network security process whch applies crypto service at n/w transfer layer..
- its a conversation of d data into the form of ciphetext..
- its widely used on wireless communication ...fr ex..credit card purchase online,,,disscusion of two company..etc etc..
What are the advantages and disadvantages of war driving?
The advantage is that you may find sites to connect to the Internet without charge.
The disadvantage is that is takes time, energy, possibly gasoline (if by car), and then money.
What is the relationship between data -communication and computer networking?
Computer networking is a direct outgrowth of data communication.
Data communication covers many more areas of electronic communication than computer networking (think of computer networking as a subtopic area of data communications). This would include telephone communications, use of radar and other media, and so forth.
Computer networking concerns itself primarily with packet driven data and the idea of what a network is and is composed of. It would not cover the areas that are not directly related to computers, such as voice telephony (analog), telecommunications, PBX connections, cellular and personal communication systems, radio systems, light systems, video conferencing, etc.
The "data world" grew out of the "voice world". The use of analog dialup services is where it all started. So there is the relationship; computer networking is the result of what happened with data communication.
PSTN may also be referred to as or called POTS?
A PSTN may use a POTS line (dial-up connection), however, the PSTN may use other technologies as well. So, POTS refers to a way of connecting to an ISP or other service using a dial-up connection, whereas the PSTN refers to the phone company providing several kinds of data service connections.
When would a PC need a default gateway address?
You would only need a default gateway address if you wanted to route packets outside your local area network.
How do you upgrade wep security to wpa2?
You have to have a router capable of supporting WPA2 as well as a wireless adapter in your computer should support it too. If you are sure that you satisfy both, you need to log in your router, and in settings for wireless network security choose WPA2.
What are two characteristics of clients in data networks?
May upload data to servers
How do you get encryption key from software?
It's pretty simple. When you encrypt your data with any software (say for example, Data Protecto) you will automatically get your encryption keys. The p[assword of which will be known only by you.
