Interview Questions.

Question 1. What Is Server Load Balancing?

Answer :

Server Load Balancing (SLB) presents network overall performance and content delivery by enforcing a series of algorithms and priorities to respond to the unique requests made to the community. In simple terms, SLB distributes customers to a collection of servers and guarantees that customers are not despatched to failed servers.

Question 2. What Information Needs To Be Provided In Order To Set Up My Appliance To Do Cookie Load Balancing?

Answer :

You want the cookie call, cookie values, the VIP to bind to, and the agencies to balance to.

Networking Interview Questions
Question 3. What Is Health Check In Refer To Load Balancer ?

Answer :

The Health Check feature of the burden balancer that permits you to set parameters to perform diagnostic observations at the overall performance of net servers and web server farms associated with each appliance. Health checking lets in you to determine if a particular server or service is jogging or has failed. When a carrier fails health assessments, the SLB set of rules will forestall sending customers to that server till the provider passes fitness exams once more.

Question 4. When Load Balancing To A Real Server, Which Server Will Be Accessed First?

Answer :

This depends on the load balancing method that you choose. Here are a few examples:

Least connections (lc) method " The actual server with the bottom wide variety of concurrent connections will receive the primary connection. Round robin (rr) approach " The actual server with the bottom entry index gets the first connection. Shortest response (sr) " The loadbalancer or appliance will establish connections with every server and calculate the round journey time. The purchaser connection will go to the real server with the lowest reaction time.

Networking Tutorial
Question 5. What Is The Difference Between A Persistent Cookie Policy And A Qos Cookie Policy In Array Network Loadbalancer ?

Answer :

A Persistent Cookie coverage selects a collection primarily based on the cookie name. A QoS Cookie policy selects a server organization primarily based at the cookie call and fee assigned to that institution.

Exchange Server 2010 Interview Questions
Question 6. What Is Global Server Load Balancing (gslb)?

Answer :

GSLB operates very in addition to SLB, but on a global scale. It permits you to load stability VIPs from one-of-a-kind geographical locations as a single entity. This affords geographical site fault tolerance and scalability.

Question 7. Does Clustering Need To Be Turned On In Order To Use Gslb?

Answer :

Yes, Clustering need to be configured and grew to become on so as to use GSLB. Each proxy inside the website online (or cluster) should have the equal configuration. Hence, each equipment can act as a DNS server if it turns into a grasp for the website. Each web page may have a completely unique cluster/SLB/GSLB configuration, and you'll use the gslb web page overflow command to feature the remote GSLB website to the neighborhood equipment.

Domain Name System(DNS) Interview Questions
Question 8. What Load Balancing Methods Are Supported With Array Network Gslb ?

Answer :

The Array equipment helps the following techniques for GSLB:

lc " Least connections sends customers to the website that has the least wide variety of modern connections.
Rr " Round robin in reality sends customer to every web page in round robin succession.
Overflow " Overflow lets in requests to be despatched to some other (faraway) website whilst the nearby website online is 80% loaded.
Question nine. What Is Reverse Proxy Cache?

Answer :

Reverse Proxy Cache is a cache that is in front of the starting place servers, therefore using the time period opposite inside the name. If a purchaser requests a cached item, the proxy will carrier the request from the cache rather than the origin server.

Firewall Support Interview Questions
Question 10. What Is Meant By Dynamic And Static Content? Can My Array Appliance Cache Dynamic Content?

Answer :

When a customer requests a web page, an internet server returns the requested content material. If the content material is retrieved from disk/memory and again to the patron with out further processing, the content is said to be static. If the content material is generated on-the-fly by way of the server (e.G., primarily based on database statistics), it is referred to as dynamic content.

Question eleven. What Is Recursion Depth?

Answer :

In a tree structure, it refers to the range of degrees that may be traversed beneath the principle or determine web page. This is often used to specify how an awful lot of an internet website (how many levels deep) to preload into the cache.

SQL Server Analysis Services (SSAS) Interview Questions
Question 12. How Does The Cache Decide What To Cache?

Answer :

The HTTP Cache-Control header determines the cacheability of the item and can also decide how lengthy the object need to be cached. The cache may be configured to override the cacheability of an object by specifying the hostname and a normal expression that suits within the URL of the object.

Networking Interview Questions
Question 13. What Algorithms Are Used For Cache Content Replacement?

Answer :

The Array(Hardware load balancer) Cache makes use of numerous algorithms for figuring out cache replacement behavior, relying on the context. In most instances, the Array will use LRU (Least Recently Used) to put off older content material when space is needed.

Question 14. What Is Real Clustering?

Answer :

Real clustering allows all configurations from all home equipment in the cluster to be synchronized. Of path, best international parameters which include the SLB configuration are synchronized. Local parameters such as interface IP addresses are not synchronized.

Question 15. What Is Virtual Clustering?

Answer :

Virtual clustering presents fault tolerance for VIPs among cluster individuals. For instance, if an appliance is handling visitors and it fails, some other equipment in the cluster will take over site visitors processing.

BEA WebLogic Server Interview Questions
Question 16. How Does Virtual Clustering Work?

Answer :

In a cluster of Array home equipment(h/w load balancer), one equipment will become Master for a specific VIP and handles all site visitors associated with that VIP. All others stay in Backup fame. If the appliance containing the Master fails, one of the appliances in Backup fame changes to Master popularity. Note: If a couple of VIPs are configured, then Masters can be configured in order that they are dispensed most of the home equipment within the cluster, offering extra performance.

Question 17. What Parameters Need To Be Defined In The Cluster Configuration?

Answer :

Cluster ID, VIP deal with, interface (Outside or Inside), priorities, and authorization approach (password or none) ought to be described. Preempt and mrthresh are optional.

Firewall (computing) Interview Questions
Question 18. What Is The Purpose Of Content Rewrite?

Answer :

The Content Rewrite characteristic allows CDN (Content Distribution Network) reference strings to be dynamically inserted into URLs which are embedded in web pages. With respect to 1 unique CDN, the term "linux" refers to the rewriting of embedded URLs to point to ubuntu-linux"s network.

Exchange Server 2010 Interview Questions