3. Describe the Function of Common Networking Components (such as Switches, Routers, Firewalls, and Load Balancers) 200-901 Practice Questions (Page 7)

Questions 31–35

1. 31application · medium

   A company has two sites connected by a WAN link. Each site has its own LAN. The network team wants to ensure that traffic from site A to site B is forwarded based on the destination IP address and that the path is determined by the routing table. Which device should be used at each site to connect the LANs to the WAN?

   • AA load balancer with a round-robin algorithm
   • BA router with a routing protocol
   • CA firewall with a default permit rule
   • DA switch with VLANs
   Reveal Solution Discussion Select an answer first
2. 32application · medium

   A company's web server is hosted on a public IP address. The security team wants to allow external users to access only HTTPS (port 443) on the server, while blocking all other inbound traffic. Which device should be placed at the network perimeter to enforce this policy?

   • AA load balancer with a health check
   • BA router with a static route
   • CA firewall with an inbound ACL
   • DA switch with port security
   Reveal Solution Discussion Select an answer first
4. 33foundation · easy

   How does a firewall decide whether to allow or block a packet?

   • ABy looking up the destination MAC address in its MAC address table
   • BBy consulting its routing table to find the best path
   • CBy applying security policies that define allowed and denied traffic
   • DBy using a load-balancing algorithm to distribute traffic
   Reveal Solution Discussion Select an answer first
5. 34application · medium

   An e-commerce site uses a load balancer to distribute traffic to three web servers. The load balancer performs health checks every 30 seconds. One server fails and stops responding. What is the immediate effect on user traffic?

   • AThe load balancer redirects all traffic to a backup data center
   • BThe load balancer stops sending new requests to the failed server after the next health check
   • CUsers continue to receive errors until the server is manually removed
   • DThe load balancer sends all traffic to the remaining servers immediately
   Reveal Solution Discussion Select an answer first
6. 35application · medium

   A company runs a critical application on a cluster of four servers. The application experiences occasional spikes in traffic. The IT team wants to ensure that no single server becomes overwhelmed and that if one server fails, traffic is redirected to the remaining servers. Which solution should be implemented?

   • AA router with a static route to each server
   • BA firewall with a failover pair
   • CA load balancer with health checks and a load-balancing algorithm
   • DA switch with a single VLAN
   Reveal Solution Discussion Select an answer first