3. Describe the Function of Common Networking Components (such as Switches, Routers, Firewalls, and Load Balancers) 200-901 Practice Questions (Page 4)

Questions 16–20

1. 16expert · hard

   A network engineer is troubleshooting a connectivity issue between two hosts on different VLANs. The hosts are connected to the same switch, and the switch is configured with VLANs and an SVI for inter-VLAN routing. The engineer verifies that the hosts have correct IP addresses and that the SVI is up. However, the hosts cannot ping each other. The engineer checks the switch's MAC address table and sees that the MAC addresses of both hosts are present. What is the most likely cause of the issue?

   • AThe firewall is blocking ICMP between the VLANs
   • BThe load balancer is not distributing traffic between the VLANs
   • CThe switch's routing table does not have a route for the destination subnet
   • DThe switch's MAC address table is full, causing flooding
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   What is the primary function of a router in a network?

   • ADistribute traffic across multiple servers to optimize resource use
   • BForward frames within a LAN based on MAC addresses
   • CFilter traffic based on security policies to protect network boundaries
   • DForward packets between different IP networks based on IP addresses and routing tables
   Reveal Solution Discussion Select an answer first
4. 18expert · hard

   A network administrator is troubleshooting a performance issue on a switch. The switch is experiencing a high rate of frames being flooded to all ports. The administrator checks the MAC address table and finds that it is not full. What is the most likely cause of the flooding?

   • AThe switch's routing table is missing a route
   • BThe switch is receiving frames with unknown destination MAC addresses
   • CThe firewall is blocking traffic to the switch
   • DThe load balancer is sending too much traffic to the switch
   Reveal Solution Discussion Select an answer first
5. 19expert · hard

   A company runs a web application on three servers behind a load balancer. The load balancer is configured with a round-robin algorithm. The application uses sticky sessions, so a user's session must be maintained on the same server. The company is experiencing issues where users are being logged out intermittently. The administrator suspects that the load balancer is sending requests from the same user to different servers. Which configuration change should be made?

   • AAdd more servers to the load balancer pool
   • BEnable source IP affinity on the load balancer
   • CChange the load-balancing algorithm to least connections
   • DConfigure the firewall to allow session traffic
   Reveal Solution Discussion Select an answer first
6. 20expert · hard

   A company has a web application with a load balancer that distributes traffic to two servers. The firewall has a rule that allows HTTPS from the internet to the load balancer's virtual IP. The load balancer forwards traffic to the servers on HTTP port 8080. The security team wants to ensure that the servers cannot be accessed directly from the internet. What is the most effective configuration?

   • AAdd a firewall rule that allows HTTPS from the internet to the servers on port 443
   • BConfigure the load balancer to use source IP affinity
   • CDisable the firewall rule that allows HTTPS to the load balancer
   • DPlace the servers in a private subnet and allow only the load balancer to reach them on port 8080
   Reveal Solution Discussion Select an answer first