Network and Security Engineer L2 Interview Questions and Answers

Sandbox inspection is a security mechanism that isolates and analyzes suspicious files in a controlled environment.

• Sandbox creates a virtual environment to execute and observe potentially malicious files.

• It monitors the behavior of the file to determine if it is safe or malicious.

• Sandbox can detect malware by analyzing its actions without risking the actual system.

• Common sandbox tools include Cuckoo, FireEye, and Palo Alto Networks WildFire.

DNS sinkhole is a technique used to redirect malicious traffic to a controlled server for analysis or blocking.

• DNS sinkhole involves redirecting DNS queries for malicious domains to a sinkhole server.

• It can be used to prevent malware from communicating with its command and control server.

• Sinkholing can also be used to gather intelligence on malicious activities by analyzing the traffic.

• Popular tools like BIND and Pi-hole can be used to implement DNS sinkholing.

Persistence type in load balancer refers to the method used to maintain session affinity for client requests.

• Persistence type ensures that subsequent requests from the same client are directed to the same server.

• Common persistence types include source IP, cookie-based, SSL session ID, and URI-based.

• For example, source IP persistence uses the client's IP address to route subsequent requests to the same server.

IPsec VPN works by encrypting and authenticating all traffic between two endpoints over the internet.

• IPsec VPN uses protocols like AH (Authentication Header) and ESP (Encapsulating Security Payload) to provide security.

• It creates a secure tunnel between the two endpoints, ensuring confidentiality, integrity, and authenticity of the data.

• IPsec VPN can be configured in different modes like transport mode and tunnel mode.

• It requires both ends of the VPN connection to have compat...read more

Packet capture process involves capturing network traffic for analysis and troubleshooting.

• Use tools like Wireshark or tcpdump to capture packets

• Specify the network interface to capture traffic from

• Apply filters to capture specific packets of interest

• Analyze captured packets for troubleshooting network issues