Networking Basics and Terminology (2) Flashcards
One backend server named HOST 2 is used by a load balancer in a backend pool. HOST 2 has more RAM and CPU processing power than others in the same backend pool. You need to ensure that more client requests are serviced by this powerful server. What should you do?
Assign a lower priority weight value to HOST 2.
Assign a low priority weight value to the load balancer.
Assign a higher priority weight value to HOST 2.
Assign a higher priority weight value to HOST 2.
Assigning a higher priority weight value to HOST 2 as compared to other backend hosts in the same pool means HOST 2 will service more requests than other servers in the pool
Which load balancing scheduling algorithm treats all backend servers equally when it comes to client request processing capabilities?
Round robin
Weighted round robin
Random
Round robin
Round robin sends traffic to the first backend node, then the second, the third, back to the first, and so on. All servers are treated equally when it comes to client processing capability
Which of the following terms is the most closely related to a load balancer?
Reverse proxy
Forward proxy
Jump box
Reverse proxy
A reverse proxy accepts clients requests and forwards them to an internal host or hosts for processing, thus hiding the true identity of the internal host(s)
Which of the following load balancing solutions is best suited for routing incoming video-streaming requests to specific backend servers optimized for streaming?
Layer 4 load balancer
Fixed weight
Layer 7 load balancer
Layer 7 load balancer
OSI layer 7 (the application layer) load balancers can inspect URL requests, such as those that may include references to media, and send those requests to specific backend hosts configured to stream media
You are configuring a load balancer to support a backend pool of FTP servers using standard port numbers. Which TCP ports should the load balancer accept FTP requests on?
20, 21
21, 23
21, 80
20, 21
FTP normally uses TCP ports 20 and 21
Users complain that when they access a load balanced shopping web site, periodically the contents of their shopping cart is lost. What should you configure in the load balancer to alleviate the issue?
Active-passive
Virtual IP
Persistence
Persistence
Configuring the load balancer persistence setting ensures that client session traffic continues to the same backend server. This can be especially important when server-side storage is used for user sessions
You are configuring load balancer support for an HTTPS custom web application. Which of the following statements regarding this scenario are correct? (Choose two.)
Backend servers can listen on any port number.
Traffic between the load balancer and backend servers does not have to be encrypted.
The backend server port number must be the same as the load balancer VIP port number.
HTTPS requires an active-active load balancer configuration.
Backend servers can listen on any port number.
Traffic between the load balancer and backend servers does not have to be encrypted.
Backend web servers may be configured to listen on TCP port 400, while the load balancer VIP configuration listens on the standard HTTPS port, TCP 443. Load balancers can be configured as SSL/TLS termination points to offload the extra encryption/decryption processing from the backend servers
You are designing a load balancing strategy for a multi-tiered web app named APP1 that uses frontend publicly accessible web servers, application servers, and database servers. APP1 experiences a large number of requests each day. You need to ensure that the performance of each web app tier is optimized. What should you do?
Configure an internal load balancer in front of the web servers, an internal load balancer between web servers and app servers, and a public load balancer between app servers and database servers.
Configure a public load balancer in front of the web servers, an internal load balancer between web servers and app servers, and another internal load balancer between app servers and database servers.
Create a load balancer active-active configuration.
Configure a public load balancer in front of the web servers, an internal load balancer between web servers and app servers, and another internal load balancer between app servers and database servers.
To ensure that each web app tier performs optimally, each tier should have a load balancer; a public load balancer between the Internet and the frontend web servers, an internal load balancer between web servers and apps servers, and another internal load balancer between app servers and database servers
Which IPv6 protocol is used to discover neighboring hosts on a local area network?
TCP
UDP
NDP
NDP
Neighbor Discovery Protocol (NDP) is used by IPv6 to discover nodes on a local are network
You have an active-active load balancer configuration for a web app using a backend Microsoft SQL Server database. How many SQL database instances are active concurrently?
One
Two
It depends on the backend pool configuration
It depends on the backend pool configuration
Each backend server may have a replicated SQL database, or each backend server may refer to shared storage or a dedicated server hosting the SQL database
You have configured two load balancers to work together. The first load balancer routes all client traffic to backend servers, while the second load balancer is idle. What type of configuration is this?
Active-active
Active-passive
Active-scheduled
Active-passive
An active-passive load balancer configuration links two load balancers together for high availability, but only one load balancer is active at any time
