Cisco ASA is a security appliance that provides firewall, antivirus, and intrusion prevention capabilities. It is a popular choice for businesses of all sizes, and as a result, many employers will ask questions about Cisco ASA during job interviews. If you are interviewing for a position that involves Cisco ASA, it is important to be prepared to answer questions about the product. In this article, we review some of the most common Cisco ASA interview questions and provide tips on how to answer them.
Question 13 – What is Active/Standby failover?
Answer – Only one unit can pass traffic with Active/Standby failover while the other unit is in standby mode. The units that run in either single or multiple context mode have Active/Standby failover availability.
The Standby unit monitors the Active unit, and both share the state information. If the Active unit goes down, the standby unit takes over the role of the Active unit and starts forwarding traffic. Before passing traffic, the unit that becomes active assumes IP addresses and MAC addresses from the failed unit.
Cisco ASA Firewall Interview Questions and Answers
Here are the most asked Cisco ASA Firewall interview questions and answers that are favorites to most interviewers. Understanding these questions will give you a better chance of clearing any job interview.
Question 8 – What is DMZ Zone, and explain its purpose and usage?
Answer – DMZ Zone is considered with reference to Perimeter Firewall. DMZ Zone has security level 50 on ASA Firewall and is what sits between an organizations internal network and an external network. A DMZ network permits Internet users to connect to the public servers of a business. A DMZ network is responsible for ensuring the security of a private network. A DMZ is an open subnetwork to the public but is behind a firewall.
A DMZ lets you redirect traffic from your WAN port to an address on your specific IP. You can set security rules for firewalls to permit access to specific ports and services within the DMZ from both the LAN as well as the WAN.
Question 1 – What is a Firewall, and at which layer of the OSI model does it works?
Answer – Firewall is a device that is placed between a trusted (Higher security Zone / Inside Network) and an untrusted network (Low-security Zone / Outside Network) to provide security to users, servers, and internal network. It allows or denies traffic that is allowed to enter or leave the network according to pre-configured rules.
Network firewalls guard an internal LAN network from malicious access from the outside/unsecured zone, such as malware-infested websites or vulnerable ports. A Firewall also regulates inbound and outbound communications between devices.
It works at the Network (Layer 3), Transport (Layer 4), and Application layers (Layer 7) of the OSI Model.
In this article, we will discuss Cisco ASA Firewall Questions and Answers. If you are preparing for the network job, I’ll recommend you to go through all of the below questions and answers. Let’s start!
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Question 3 – What is the difference between a Stateful & Stateless Firewall?
Answer – Stateful Firewall – Stateful Firewalls are equipped to monitor and detect the state of all traffic that is on the network. They can track and defend based on traffic flow patterns, and a Stateful firewall is aware of connections that go by it.
It adds and keeps details about the connections of users in a state table, also called the connection table. It then utilizes this connection table to establish security policies that apply to the connections of users. Examples of stateful firewalls are: Juniper, ASA, and Checkpoint.
Stateless Firewalls – Stateless firewalls concentrate on specific packets and use preset rules to filter traffic. Stateless firewalls, however, do not examine the status of connections; instead, only at the packets. An excellent example of a filtering firewall is the Extended Access Control lists available on Ciscos IOS Router.