Forescout Administrator Interview Questions

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Q: What do you mean by protocols in a network?
Protocols are nothing but a set of rules and regulations that governs some important tasks on a network. Protocols can be related to management, access, data transfer, as well as security. It is nothing but protocols that always make sure of smooth flow of work and a network performance without compromising the security.

Q: What are the responsibilities of a network security administrator according to you?
Network security is extremely important as data leakage can create a lot of issues for any business. Therefore network administrator should be careful in performing his/her duties which are:

1. Assuring the authenticity of all the ID’s created on the server.
2. Installing/removing wanted/unwanted applications.
3. Assuring firewall is turned ON all the time and antivirus software is active.
4. Taking immediate action against threats and malware found.
5. Monitoring and regulating security policies.
6. Staying up to date with latest security trends.

Q: Suppose you are performing some important task which is urgent. At the same time you find a huge security threat to the data or server, would you stop your task and take actions against the issue or will continue with your work?
I can understand the priority of any task assigned to a resource. However, what I believe is the security to data or server is more important than anything else. Thus, I will first try to avoid the threat by taking appropriate action and will then resume my work. Also, I will be informing the management regarding it at the same time.

Q: What are the factors that need to be paid attention to for security while transferring the same internally or externally from a server within an organization?
Data security always matter. There are certain techniques that can be adopted to keep up the pace in this matter. When it comes to security, cryptography is a technique that can help in transferring data securely. Not just during transferring but this technique can be applied to entire data or information which is kept on a server and in fact is a very confidential. Another approach is sharing information only with the authorized resources only.

Q: Who are Black Hat hackers, what are the risks associated if the data is accessed by them?
Hacking is a complex term and is generally divided into two categories and i.e. White hat and Black Hat. The principles of both are same but the motive is different. White Hat hacking is generally authorized and is done for some security measures. Its motive is not to steal information. On the other side, Black Hat hacking is unauthorized and is generally considered as an attack on a network or on a server for data stealing and other similar motives. 

Q: What actions could be taken for securing information that matters a lot for a business?
Data or information security always matter. There are certain things that can go wrong in case no attention is being paid to the security of information. The basic approach is to secure the same with passwords and impose a limit on its access. Enabling firewall is another thing that could be done to keep the pace up all the time. 

Q: Do you think enhancing the security of a network or a server can impose a limit on operational efficiency in an organization?
It is true that sometimes network security policies impose a limit on the operational efficiency in an organization. However, it’s worth doing so as after all, network security is important without which businesses couldn’t even survive in the way they want.

Q: Name some Networking devices that you are familiar with?
There are certain devices which are used in a network and they are:

1. Switch
2. Router
3. Hub
4. Modem
5. Signal Repeater
6. Bridge

Q: Is networking security a team work? Why or why not
 Well, most of the tasks performed within an organization are team work and so does security of a network. An administrator can define and regulate policies but their success always depends on how well they are adopted and followed by the resources. Everyone has to play his/her role and contribute in assuring a secure network management.

Q: Name any three UNICAST routing algorithms?
Distance Vector Routing, Flow-based Routing and Hierarchical Routing

Q: How well can you define authentication?
Authentication is a method to make it sure that the data is accessed by those who are authorized to do so. Basically, this approach is implemented by assigning a unique username and password to those who are authorized. In case they are not and want to access the useful data, they have to seek the permission from management first. Authentication always makes sure of data and information security.

Q: What actions could be taken against URL Manipulation?
There are certain methods that are available to avoid such an issue. The most common method in the present scenario is using 128-bit encryption approach on the URL where security matters a lot. Also, the SSL certification of the site should be trusted and verified. 

Q: Do you think some sort of risks is always associated with remote administration? If so, how they can be stopped?
Remote administration is becoming a prime need in a lot of organizations and without the same performing and managing business processes is becoming a huge challenge. Therefore appropriate attention is required. However, it is true that there are some risks which are always associated with this approach. Risks can be controlled by assuring access is given internally only and not outside the organization. Other security measures include recording the screen and imposing a limit on the access. 

Q: Name the two important features of a network? On what parameters of a network do they depend?
Well, the features for any network that highly matters are performance, as well as security. There are certain factors on which it both depends on and they are:

1. Network Traffic
2. Security policies are updated or not
3. What are the protocols to access the useful information from server
4. The way nodes are connected with each other
5. Exact number of nodes

Q: What does IP stand for in a network?
 It stands for Internet Protocol and is nothing but the physical address of a computer registered on a network

Q: What is a most important element of any network and why does its security is always a prime concern?
The most important element of any network is server. A server is actually a machine that acts as a central device for all their machines or systems. All the data of an organization/company is stored on the server. Data leakage can be huge issues for an organization. Therefore server security is always a prime concern. There are various restrictions that are imposed on users to ensure proper security of same. 

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Q: Is it always possible in a network to have a central server for controlling and managing of other device? What if server is not deployed? Can same level of security be ensured?
Yes, it is possible to connect the systems with each other and maintain a network without having a central server. This type of interconnection is commonly called as peer-to-peer network. When it comes to security, each system acts as a server for other and therefore all the systems or nodes on a network are to be covered with the same level of security. However, because it’s a cost-saving approach and is generally considered where no much emphasis is required on security such as in case of every small organization. 

Q: In a network, what if the data to be transferred from one system to another is much beyond than the capacity of channel? How can data be transferred reliably in such a case? Does it make any effect on the network or on the server? 
Many times it has been seen that data to be transferred is larger than the capacity of channel. During such a situation, the concept of framing is useful as it doesn’t make any effect on network, as well as server performance. Framing is nothing but dividing a large data into small packets which are known as frames and then transferring them from their source location to destination. 

Q: Give any two reasons for the slow performance of a network. How you will deal with such a situation
The most common issue is congestion which is nothing but a situation in such a network is performing slow just because of a very large number of requests from different nodes. Another reason could be bulk data transfer by multiple systems on a similar network. This problem can be eliminated by creating interrupts on the server for transfer of data which is not important for that particular time. 

Q: Can you tell what the significance of the IP address is?
IP address is like identity of a system on a network. It helps the server to recognize the system so well that no conflicts could be created due to any reason. Sometimes IP confliction is there but the same problem can simply be eliminated. 

Q: What exactly do you know about Log Shedding?
Well, it is nothing but a basic algorithm that is used for congestion controlling.

Q: Give abbreviations of the following
1. TCP-Transmission Control Protocol
2. FTP- File Transfer Protocol
3. HTTPS- Hyper Text Transfer Protocol
4. OSI- Open System Interconnection

Q: What according to you is a link?
A link is nothing but is used to refer or define the link between two devices on a network. The connection can be wired or wireless and reflects whether one node is capable or able to communicate with each other or not. 

Q: Give abbreviation of ICMP
Its internet Control Message Protocol

Q: Explain the concept of UDP
The UDP is nothing but actually a combination of two TCP models. The primary aim is to boost the efficiency and reliability of a network. It is also true that UDP is quite secure as compared to the TCP alone. It stands for user datagram protocol. 

Q: As a network administrator, what will be your responsibilities in an organization?
The role and responsibilities of a network administrator are not just limited to one specific approach. The administrators have to manage a lot of tasks such as server management, hardware management, applications installation/removing, system maintenance, assuring backup of all important and confidential data securely, managing the accounts of users, network troubleshooting and so on.  

Q: Does attenuation always mean poor signal strength?
Attenuation is a situation when the networks are unable to maintain performance due to the poor strengthening of the signal. This can be due to the failure of signal repeaters or their improper use. Attenuation doesn’t always mean poor signal strength but it can be due to the mixing of two different frequencies. 

Q: What exactly do you know about SSH and what port does it actually use?
SSH stands for Secure Shell and is a well-known approach among the Linux users. Its primary aim is to connect two devices in a secure manner. It really doesn’t matter what type of devices they are, this approach is best in every aspect to keep up the pace. It also helps in converting an unsecured connection to secure one. It makes use of port number 22 on a TCP model.

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Q: What exactly do you know about Subnet Mask?
It is generally combined with the Internet Protocol address of a device for the purpose of identification of two parts and they are host address, as well as the network address. It is made up of 32 bits.

Q: Name one issue that can affect the decision of setting up a large network
It’s nothing but Topology which is nothing but the way how the systems are connected with each other. 


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