Explain Application Client-Server Communication F5CAB5 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A web application is experiencing high latency on a BIG-IP system. The administrator notices that each HTTP request from a client creates a new TCP connection. The application uses many small resources (CSS, JS, images) on the same page. Which configuration change would most likely reduce the latency?

   • AIncrease the TCP receive window on the server-side profile.
   • BEnable HTTP keep-alive on the client-side profile.
   • CChange the load balancing method to round-robin.
   • DDisable TCP timestamps on the client-side profile.
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2. 7application · medium

   A client attempts to send an email using SMTP to a mail server. The client resolves the mail server's domain name to an IP address and initiates a TCP connection. Which destination port is used by default for SMTP submission?

   • A110
   • B587
   • C25
   • D143
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4. 8application · medium

   A user reports that a web application returns a 404 error for a specific URL, but other URLs work fine. The BIG-IP administrator checks the virtual server configuration and sees that the HTTP profile is set to 'HTTP/1.1' and the server is a standard web server. What is the most likely cause of the 404 error?

   • AThe keep-alive connection is causing the request to be sent to the wrong server.
   • BThe client is using HTTP/1.0, which is not supported by the server.
   • CThe BIG-IP is not forwarding the request to the correct pool member.
   • DThe requested resource does not exist on the server.
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5. 9foundation · easy

   How does a server indicate that it supports HTTP persistent connections?

   • ABy sending a special SYN packet after each response.
   • BBy setting the 'Content-Length' header to zero.
   • CBy including the 'Connection: keep-alive' header in its response.
   • DBy using a different port for subsequent requests.
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6. 10application · medium

   A client sends an HTTPS request to a BIG-IP virtual server. The BIG-IP has a client-side SSL profile and a server-side SSL profile. The administrator wants to inspect the HTTP headers for an iRule. At which point in the traffic flow can the iRule see the plaintext HTTP headers?

   • AOnly if the iRule is attached to the client-side virtual server.
   • BBefore the client-side SSL handshake completes.
   • CAfter the client-side SSL decryption and before the server-side SSL encryption.
   • DAfter the server-side SSL encryption.
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