Explain Application Client-Server Communication F5CAB5 Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Which protocol is used to send email from a client to a mail server, and what is its default port?

   • AHTTP on port 80
   • BPOP3 on port 110
   • CSMTP on port 25
   • DFTP on port 21
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2. 22foundation · easy

   What is the primary benefit of HTTP persistent connections (keep-alive) in client-server communication?

   • AThey reduce the need for DNS resolution on subsequent requests.
   • BThey encrypt the data exchanged between client and server.
   • CThey allow multiple requests and responses to be sent over a single TCP connection, reducing latency.
   • DThey increase the maximum transmission unit (MTU) for data packets.
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4. 23foundation · easy

   A client wants to access a website at www.example.com. What does the client do first to resolve this domain name?

   • AIt sends an HTTP request to the domain name directly.
   • BIt checks its local ARP cache for the IP address.
   • CIt broadcasts a request to all devices on the local network.
   • DIt sends a DNS query to its configured DNS resolver.
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5. 24foundation · easy

   What is the primary purpose of DNS resolution in client-server communication?

   • ATo compress the data being sent to the server.
   • BTo authenticate the server to the client.
   • CTo encrypt the communication between client and server.
   • DTo translate a human-readable domain name into an IP address that the client can use to connect.
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6. 25application · medium

   A user is accessing a web application that is hosted on a server in a different country. The user reports that the application is slow to load. The administrator checks the BIG-IP and sees that the client is connecting to a virtual server that is in the same country as the user. However, the server is in a different country. What is the most likely cause of the slow performance?

   • AThe DNS resolution is slow because the domain name is hosted on a server in a different country.
   • BThe latency is due to the distance between the BIG-IP and the server.
   • CThe HTTP keep-alive is disabled, causing a new connection for each request.
   • DThe TCP handshake is slow because of the distance between the client and the BIG-IP.
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