Explain Application Client-Server Communication F5CAB5 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   What is the primary role of a load balancer in client-server communication?

   • ATo distribute incoming client requests across multiple servers to improve performance and reliability.
   • BTo resolve domain names to IP addresses.
   • CTo encrypt all traffic between client and server.
   • DTo block all traffic that does not originate from a trusted IP.
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2. 2foundation · easy

   Why is the TCP three-way handshake considered essential for reliable communication?

   • AIt authenticates the client to the server.
   • BIt determines the maximum segment size for the connection.
   • CIt ensures both sides agree on initial sequence numbers and are ready to exchange data.
   • DIt encrypts the data before transmission.
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4. 3foundation · easy

   A user opens a web browser and types a URL. According to the client-server model, what is the first step the browser (client) takes?

   • AIt resolves the domain name to an IP address using DNS.
   • BIt sends an HTTP request to the web server's IP address.
   • CIt sends a SYN packet to the server's port 80.
   • DIt establishes a TCP connection with the web server.
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5. 4expert · hard

   A BIG-IP administrator is troubleshooting a performance issue. The virtual server is configured with a client-side TCP profile that has a low 'Maximum Segment Size' (MSS) value. Clients are experiencing slow downloads. What is the most likely impact of the low MSS?

   • AIt causes the TCP handshake to fail because the MSS is too low.
   • BIt disables TCP window scaling, reducing performance.
   • CIt increases the number of packets needed to transfer the same amount of data, increasing overhead.
   • DIt reduces the TCP window size, limiting throughput.
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6. 5expert · hard

   A BIG-IP administrator is configuring a virtual server for an application that uses WebSockets. The application requires a persistent connection for real-time updates. The administrator is concerned that the default HTTP profile may close the connection. Which configuration is necessary to support WebSockets?

   • ADisable the HTTP profile on the virtual server.
   • BUse a TCP profile with a long idle timeout.
   • CUse a load balancing method that supports sticky sessions.
   • DEnable HTTP keep-alive on the client-side profile.
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