A) A virtual private network, or VPN, is an encrypted connection over the Internet from a device to a network. These devices are known as endpoints and may be laptops, tablets, or smartphones. It should also include recovery of the accrual physical business location and recovery of the business processes necessary to resume normal operations. 15 signs your job interview is going horribly, Time to Expand NBFCs: Rise in Demand for Talent, Logical topologies (Ethernet, ATM, 802.11, VoIP, etc. Consider moving to the 802.11i standard with AES encryption when it is finalized. Working as a night guard is quite different than controlling crowds at a music festival. Many organizations don’t patch regularly and tend to not patch critical systems because they don’t want to risk downtime. Mention all of the industries you have worked in, and explain any experience you have in their industry in detail. A) Trojan viruses are disguised as helpful software programs. A password policy should require that a password: Question 135. How Can An Operating Systems Help Administrators Control A Network And Manage Security? Question 44. Question 25. A SID contain * User and group security descriptors * 48-bit ID authority * Revision level * Variable sub authority values. Question 81. How Does An Encryption Help Security Of An Network? Adware can redirect your browser to unsafe sites, and it can even contain Trojan horses and spyware. Question 71. A) UDP flood: User Datagram Protocol (UDP) floods attack random ports on a remote server with requests called UDP packets. These Network Security questions and answers were asked in various Networking interviews. Dear Readers, Welcome to Network Security Objective Questions have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of Network Security.These Objective type Network Security Questions are very important for campus placement test and job ⦠Yes, it can be possible by third party software in computer and 3g in mobile.In computer third software like skype can be better media of communication method. This would indicate that the security defenses are weak, patching may not be occurring, or other vulnerabilities exist. This article will present answers to the most frequently asked questions in an interview about Network firewalls. Network Security Questions and Answers contain set of 28 Network Security MCQs with answers which will help you to clear beginner level quiz. Question 145. It protects you from sniffing programs. Question 114. Explain What Does Cia Stand For In Security Management? A) ICMP (ping) flood: An Internet Control Message Protocol (ICMP) flood sends ICMP echo request packets (pings) to a host. Question 62. The second principal characteristic is that OSPF is based on the SPF algorithm, which sometimes is referred to as the Dijkstra algorithm, named for the person credited with its creation. Organizations often focus on traffic and attacks coming into the network and forget about monitoring outgoing traffic. Here Coding compiler sharing a list of 53 interview questions on Network Security. Provide A Reason As To Why Https Should Be Used Instead Of Http? A ____ Virus Can Interrupt Almost Any Function Executed By The Computer Operating System And Alter It For Its Own Malicious Purposes? Think of remote access as computer to network. 26) How does a virtual private network (VPN) work? Describe your customer service philosophy in the support that you would provide. ____ Uses "speckling" And Different Colors So That No Two Spam E-mails Appear To Be The Same? It is Having Complex Configuration Including Area, Process id, Wild card mask. The _____ Act Is Designed To Broaden The Surveillance Of Law Enforcement Agencies So They Can Detect And Suppress Terrorism? Correct Answer: Cross site scripting (XSS). now an ARP creates a table known as ARP CACHE/TABLE that maps ip addresses to the hardware addressess of nodes on the local network. It was pretty simple- just passwords to protect one's computer. Question 49. How Often Are You Performing Vulnerability Scanning? Content level inspection at the web server or application server will protect against attacks such as those that are tunneled in legitimate communications, attacks with malicious data, and unauthorized application usage. Now the source machine again sends the ICMP packet with TTL field as 2. Among all modern general purpose op. Networking Interview Questions. In addition to internal web, mail, and DNS servers, your internal network could also include databases, application servers, and test and development servers. ____ Are Designed To Inspect Traffic, And Based On Their Configuration Or Security Policy, They Can Drop Malicious Traffic? Ring protection is a system where multiplexers are connected in a ring topology. Question 82. Explain What Are All The Technical Steps Involved When The Data Transmission From Server Via Router? Cryptography is the deliberate attempt to obscure or scramble the information so that only an authorized receiver can see the message. In this process data that is collected from the IDS or IPS sensors needs to be put into some canonical format or a structured database format based on the preprocessing. Question 30. Which Feature On A Network Switch Can Be Used To Prevent Rogue Dhcp Servers? The only truly "secure" operating systems are those that have no contact with the outside world. What Is The Primary Function Of A Firewall? These attacks are usually aimed at accessing, changing, or destroying sensitive information; extorting money from users; or interrupting normal business processes. Question 14. A) Slowloris – Named after the Asian primate, the Slowloris moves slowly. Part of knowing your network architecture includes knowing the location of wireless networks since they create another possible entry point for an attacker. To provide the best level of detection, an organization should use a combination of both signature-based and anomaly-based intrusion detection systems. Single sign-on reduces human error, a major component of systems failure and is therefore highly desirable but difficult to implement. Question 65. If a criminal was able to slip onto your network, they would be able to access any unguarded computer, and retrieve information off of it once they have access. RARP is available for Ethernet, Fiber Distributed-Data Interface, and token ring LANs. This would help the attacker to map the internal network. A specific type of spyware is a keylogger, which records your keystrokes to reveal passwords and personal information. VPN technology is available to check whether a device meets certain requirements, also called a device’s posture, before it is allowed to connect remotely. A) There are three general types of DDoS attacks are there, they are: Volume-based attacks (UDP flood, ICMP flood), Application attacks (HTTP flood, Slowloris), Protocol attacks (SYN flood, Ping of Death). First source sends an ICMP packet with Time to Live (TTL) field as 1 to the destination address. RSA -- Authentication can be achieved by using nonce value (prime number). Question 144. The presence of the exploit means someone has successfully used that weakness and taken advantage of it. It includes VPN technology that uses strong ways to authenticate the user or device. How has your previous network administration position prepared you for this job? A) Information security, often referred to as InfoSec, refers to the processes and tools designed and deployed to protect sensitive business information from modification, disruption, destruction, and inspection. How Can You Prevent A Brute Force Attack On A Windows Login Page? Question 137. This includes IDS logs, system logs, management station logs, etc. When a packet is sent out of a server, It has source and Destination IP, source and destination Port no and source and destination Mac ID, first it is sent to the switch, The switch checks the packet whether the MAC ID is in the MAC-Address-Table if not it broad casts the message if the destination IP is not in the same segment Then it forward the packet to the gateway (normally the router or firewall). This is more secure than explicitly denying certain traffic because that can create holes and oversights on some potentially malicious traffic. Each network security layer implements policies and controls. A network is a set of devices that are connected with a physical media link. What Do You Do If Spybot Will Not 'immunize'? ____ Is A Process Of Ensuring That Any Inputs Are "clean" And Will Not Corrupt The System? When a user initiates a connection with the FTP server, two TCP connections are established. According To The Research Group Postini, Over ____ Of Daily E-mail Messages Are Unsolicited And Could Be Carrying A Malicious Payload? Explain How Does Trace Route Work? Filtering decisions are made based on both administrator-defined rules as well as context, which refers to using information from previous connections and packets belonging to the same connection. Question 139. Systems should be patched every time a new patch is released. ____ Work To Protect The Entire Network And All Devices That Are Connected To It? Question 33. 17) What is Next-generation firewall (NGFW)? Question 11. What Type Of Remote Access Is Allowed? Three basic ways: On most laptops there is a switch on the front On most towers there is a USB stick to unplug On all computers WIFI and Blue-tooth can be disabled from "my computer". These rule sets must also be customized and augmented to look for traffic and activities specific to your organization’s security policy. then the router/firewall checks its routing table and access lists if it has the information about the destination IP and if it has access to the destination IP it forwards it to the next hop, and if any one of the condition fails it just drops the packet. Question 98. For example, you must determine how long systems can be down, the impact on cash flow, the impact on service level agreements, and the key resources that must be kept running. With Operating System Virtualization, A Virtual Machine Is Simulated As A Self-contained Software Environment By The ____ System (the Native Operating System To The Hardware)? The host checks the ports for the appropriate applications. In A ____ Attack, Attackers Can Attackers Use Hundreds Or Thousands Of Computers In An Attack Against A Single Computer Or Network? How Are Subnets Used To Improve Network Security? However, in this case, victims do not even have to click a malicious link to be taken to the bogus site. Setup a account lockout for specific number of attempts, so that the user account would be locked up automatically after the specified number. The plan is no good unless it is tested at least once a year. Question 113. 1. Question 153. In addition, the DRP should address alternate operating sites. Correct Answer: integrity check value (ICV). In addition to identifying the critical business systems and processes, it is important to identify the possible threats to those systems as well as the organization as a whole. These policies should be included in the employee handbook and posted on a readily accessible intranet site. This implies a risk, especially to confidential information. (usually Md Is Used For Finding Tampering Of Data), The unique number will be generated by MD5, if it is tamped with someone, the value will be changed so you know you are tampered. MAC is designed and enforced in the initial stages and can not be changed by entity; from a laymen angle: OS writing to BIOS is not allowed. What is a firewall? There should be clear procedures and processes to follow for each policy. If the message level of the message compares correctly to the message level of the subroutine and the process, the message is reported. The below list covers 130+ important interview questions for Networking for freshers candidates as well as Networking interview questions for experienced. The command show access-lists displays all configured access lists, and show ip access-lists displays all configured IP access lists, but neither command indicates whether the displayed access lists have been applied to an interface. The Unique Number Will Be Generated By Md5, If It Is Tamped With Someone, The Value Will Be Changed So You Know You Are Tampered? The scanning should be scheduled to allow adequate time to review the reports, discover anything that has changed, and mitigate the vulnerability. Question 26. Knowing what to protect helps determine the necessary security controls. C = confidentiality: only those who should be able to see the data can see it. Spyware is often used to steal financial or personal information. It can encompass cloud services, software, and hardware. Explain What Is Difference Between Arp & Rarp? What Is Difference Between Discretionary Access Control And Mandatory Access Control? Question 104. There should also be a publicly posted incidents email address to report suspicious activity. single sign on is an authentication mechanism with session or cookie preservation, where in user is prompted only only once in a particular session with a computer s/he uses, and the same credentials are used across multiple platform for accessing different applications. In this case, an attacker attempts to obtain confidential information from the victims. Question 108. A) Firewalls put up a barrier between your trusted internal network and untrusted outside networks, such as the Internet. Encryption Under The Wpa2 Personal Security Model Is Accomplished By ____? The method activates a report-handling module when a subroutine has a message to send. Sometimes file system encryption is also used to protect stored data. Even smartphones and tablets can connect through a VPN. _____ Ensures That Information Is Correct And That No Unauthorized Person Or Malicious Software Has Altered That Data? Network security[1] consists of the provisions and policies adopted by a network administrator to prevent and monitor unauthorized access, misuse, modification, or denial of a computer network and network-accessible resources. A(n) ____ Attack Makes A Copy Of The Transmission Before Sending It To The Recipient? Creating And Managing Multiple Server Operating Systems Is Known As ____ Virtualization? A(n) ____ Is A Computer Programming Language That Is Typically Interpreted Into A Language The Computer Can Understand? What Is An Arp And How Does It Work? And secrecy is achieved by encrypting the data with the public key of the target user. This includes external web servers, external mail servers, and external DNS. Question 1 Consider these statements and state which are true. Question 118. It should only be provided over a secure communication channel that uses encryption and strong authentication, such as an IPSEC VPN. Question 37. Question 134. Question 9. Use of unencrypted remote connections such as Telnet and FTP, Contain both alphanumeric and special characters. One of the key objectives of computer security is confidentiality - information is only available to those who are supposed to have access to it. Besides Default Rule Sets, What Activities Are Actively Monitored By Your Ids? For small lan we use class-c address Explanation:In class C ip address the first three bytes out of four are for network address while the last byte is for host address which can range from 1-254 which is smallest lan possible whereas class B has two bytes and class A has three bytes reserved for host address which increases number of hosts in those classes. A split-architecture may be used where internal web, mail, and DNS are also located on the internal network. 29) What are the different types of VPNs? The Institute for Security and Open Methodologies (ISECOM) in the OSSTMM 3 defines security as "a form of protection where a separation is created between the assets and the threat". ____ Is A Windows Vista And Windows Xp Service Pack 2 (sp2) Feature That Prevents Attackers From Using Buffer Overflow To Execute Malware? Networks and Security Interview Questions And Answers Global Guideline . 12) What are the types of phishing attacks? 44) What are the different aspects of shadow IT? Network security may employ cryptography, but has many other tools to secure a network, including firewalls, auditing, Intrusion Detection Systems, and so forth. Cryptography would be used only when trying to keep messages secret when sending them across a network or keeping information secret in a file. Question 72. The attack sends small portions of an HTTP request to a server. After it is distributed, the ransomware encrypts selected files and notifies the victim of the required payment. Using the same encryption algorithm means that only those individuals that know or have the same key will be able to read any messages encrypted by the symmetric key. Authorized users gain access to network resources, but malicious actors are blocked from carrying out exploits and threats. Although this provides some security, it is not very robust, which is why your wireless network should not be used for sensitive data. 13) What are the benefits of the firewall? What Are Your Critical Business Systems And Processes? Generally we dont use RSA for encryption because of key size (1024 bits). A) Shadow IT is the use of IT-related hardware or software by a department or individual without the knowledge of the IT or security group within the organization. Advances in VPN technology have allowed security checks to be conducted on endpoints to make sure they meet a certain posture before connecting. It is developed by MIT and using a combination of encryption as well as distributed databases so that the user can log in start a session. Computer networks, when compromised by an attack or hacks, will result in negative implications to include. A) There are two types for VPNs are there, they are: A) A remote access VPN securely connects a device outside the corporate office. This can be extremely harmful to the performance of the device. The goal of interviewing should be to extract the best from the candidate, not to trick them, make them uncomfortable, or otherwise keep them from shining. Throughout the network Administrator network Engineer an ID and password or other communication that designed... Hubs do of detection, an advanced firewall with by the network Act designed... To maliciously attempt to Monitor and Possibly Prevent attempts to obtain confidential information from opening! 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