Westernacher Consulting Senior Consultant Interview Questions and Answers

Firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

• Firewall acts as a barrier between a trusted, secure internal network and another network, such as the Internet.

• It examines each packet of data that passes through it and determines whether to allow or block the traffic based on the set of rules.

• Firewalls can be hardware or softwa...read more

BGP attributes are used to determine the best path for routing traffic between networks.

• BGP attributes include: AS Path, Next Hop, Local Preference, MED, Origin, and Community

• AS Path is a list of autonomous systems that the route has passed through

• Next Hop is the IP address of the next router on the path

• Local Preference is used to indicate the preferred path for outbound traffic

• MED (Multi-Exit Discriminator) is used to...read more

VPN stands for Virtual Private Network. It allows secure remote access to a private network over the internet.

• VPN creates a secure and encrypted connection between the user's device and the private network.

• It masks the user's IP address and location, providing anonymity and privacy.

• VPN uses different protocols such as PPTP, L2TP, IPSec, and OpenVPN.

• It can be used to access geographically restricted content, bypass cens...read more

Routing protocols are used to determine the best path for data to travel in a network.

• Distance Vector protocols: RIP, IGRP, EIGRP

• Link State protocols: OSPF, IS-IS

• Hybrid protocols: BGP

• Path Vector protocols: BGP

• IGP vs EGP

VTP stands for VLAN Trunking Protocol, used to manage VLANs in a switched network.

• VTP is a Cisco proprietary protocol.

• It allows for easy VLAN management by propagating VLAN information across the network.

• VTP operates in three modes: server, client, and transparent.

• Server mode allows for VLAN creation, deletion, and modification.

• Client mode receives and stores VLAN information.

• Transparent mode forwards VTP messages but ...read more

Routers connect networks while firewalls protect networks from unauthorized access.

• Routers direct traffic between networks while firewalls filter traffic based on predefined rules.

• Routers operate at layer 3 of the OSI model while firewalls operate at layer 4 or higher.

• Examples of routers include Cisco routers, while examples of firewalls include Fortinet firewalls.

• Routers can be used to segment networks while firewalls...read more

The largest area in a histogram refers to the rectangle with the maximum area that can be formed within the histogram.

• To find the largest area in a histogram, we can use the concept of a stack.

• We iterate through each bar in the histogram and maintain a stack of bars in non-decreasing order of their heights.

• If the current bar's height is greater than the height of the bar at the top of the stack, we push the current bar...read more

Our product is the only one in the market that offers a unique combination of features and benefits.

• Our product is designed to solve a specific problem that no other product in the market can solve.

• Our product offers a unique combination of features and benefits that are not available in any other product.

• Our product is backed by extensive research and development, ensuring that it is the most effective solution in the...read more