Ampcus Tech Network Security Consultant Interview Questions and Answers

Q1. Subnetting , Firewall Basics, IPSEC VPN, Routing protocol- BGP, OSPF
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Q1. BGP and ospf and vlan
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Q2. VSS and stacking switch
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Q1. BGP in depth ospf and vlan
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Q2. Vss and switch stacking switch routing
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Q1. Technical vs no tech
Ans. 
Technical skills are essential for a Network Engineer, but soft skills are also important for effective communication and teamwork.
• Technical skills are necessary for configuring and troubleshooting network devices.

• Soft skills like communication, teamwork, and problem-solving are crucial for working effectively with colleagues and clients.

• Balancing technical expertise with interpersonal skills is key to success in the r...read more
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Q2. Dhcp vs dns gdp vs rdp frp vs 30nd
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DHCP is a protocol used to assign IP addresses dynamically to devices on a network, while DNS is a system that translates domain names to IP addresses.
• DHCP assigns IP addresses to devices on a network dynamically

• DNS translates domain names to IP addresses

• RDP (Remote Desktop Protocol) allows users to remotely connect to a computer

• FRP (Fiberglass Reinforced Plastic) is a material used in construction

• 30nd does not seem to
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Q1. What is DHCP and its protocol
Ans. 
DHCP stands for Dynamic Host Configuration Protocol, used to automatically assign IP addresses to devices on a network.
• DHCP eliminates the need for manual IP address configuration

• It assigns IP addresses, subnet masks, default gateways, and DNS servers to devices

• DHCP operates on the client-server model

• Example: When a device connects to a network, it sends a DHCP request to obtain an IP address
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Q2. What is DNS and its protocol
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DNS is a system that translates domain names to IP addresses, allowing users to access websites using human-readable names.
• DNS stands for Domain Name System

• It is a protocol used to translate domain names to IP addresses

• DNS servers store a database of domain names and their corresponding IP addresses

• DNS helps users access websites using easy-to-remember domain names instead of complex IP addresses

• Examples of DNS servers...read more
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Q3. What is job role in present company
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Q1. Salary discussion
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Q1. Ospf, bgp states
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Q2. How stp work in 3 switches
Ans. 
STP (Spanning Tree Protocol) is used to prevent loops in a network by blocking redundant paths between switches.
• STP elects a root bridge to serve as the central point in the network

• Each switch determines the best path to the root bridge based on the lowest path cost

• Ports on switches are designated as root ports, designated ports, or blocking ports to create a loop-free topology
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Q1. Site Site VPN on palo alto firewalls
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Site-to-Site VPN on Palo Alto firewalls allows secure communication between different sites.
• Configure VPN tunnel interface on both firewalls

• Define IKE gateway and IPsec crypto profile

• Create VPN tunnel interface and assign IP address

• Define security policies to allow traffic through the VPN tunnel
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Q1. Basics of Electronics and Telecommunication Engineering
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Q1. Basic of interview questions
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Q1. Routing tables in bgp and explain
Ans. 
BGP routing tables store information about routes to different networks and the best path to reach them.
• BGP uses a path-vector routing protocol to determine the best path for a packet to reach its destination.

• BGP routing tables contain information about the network prefixes, the next hop to reach them, and the path attributes that determine the best path.

• BGP routers exchange routing information with their neighbors to ...read more
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Q2. BGP Neighbor Table – table containing information about BGP neighbors. 2) BGP Table (also known as BGP topology table, BGP RIB) contains the network layer reachability information (NLRI) learned in compli...read more
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Q3. What is nat and port number that can be used
Ans. 
NAT is a technique used to map private IP addresses to public IP addresses. Port numbers are used to identify specific applications.
• NAT stands for Network Address Translation

• It is used to allow devices with private IP addresses to access the internet using a public IP address

• Port numbers are used to identify specific applications or services

• Common port numbers include 80 for HTTP, 443 for HTTPS, and 22 for SSH
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Q4. If neither the port range in source NAT pools nor the default port range are configured, the default single port range is 1024 through 63,487.
Ans. 
Default single port range when neither port range in source NAT pools nor default port range are configured.
• When neither port range in source NAT pools nor default port range are configured, the default single port range is 1024 through 63,487.

• This range is used for outbound traffic initiated by the device.

• It is important to configure the port range to avoid conflicts with other devices on the network.

• For example, if m...read more
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Q5. What is mss in tcp explain
Ans. 
MSS in TCP refers to the maximum segment size, which is the largest amount of data that can be sent in a single TCP segment.
• MSS is negotiated during the TCP three-way handshake

• It is determined by the maximum transmission unit (MTU) of the network

• MSS can be adjusted by the sender or receiver using TCP options

• A smaller MSS can help prevent fragmentation and improve network performance
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Q6. The maximum segment size is a parameter of the options field of the TCP header that specifies the largest amount of data, specified in bytes, that a computer or communications device can receive in a singl...read more
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Q7. Troubleshooting pAcket drops
Ans. 
Packet drops can be caused by various factors. Troubleshooting involves identifying the root cause and implementing a solution.
• Check for network congestion or bandwidth limitations

• Verify if the packet is being dropped at the source or destination

• Inspect network devices for errors or misconfigurations

• Use packet capture tools to analyze the traffic

• Consider implementing Quality of Service (QoS) policies

• Update firmware or
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Q8. Chekc port and duplex setting. Check mss and mtu Check link utilization
Ans. 
To check port and duplex setting, MSS and MTU, and link utilization in network engineering.
• Use command 'show interface' to check port and duplex setting.

• Use command 'ping -f -l ' to check MTU.

• Use command 'netstat -s' to check MSS.

• Use command 'show interface' or 'show interfaces utilization' to check link utilization.
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