Networking & Protocols GSEC Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A network administrator is designing a new branch office subnet. The requirement is to support exactly 50 usable host addresses per subnet while minimizing wasted address space. The office uses a private IPv4 range and will connect to the internet through a NAT gateway. Which CIDR prefix length should the administrator assign?

   • A/24
   • B/25
   • C/26
   • D/27
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   A small office network uses a single device to connect all computers. The office manager notices that when two employees transfer large files simultaneously, the network becomes very slow for everyone. The device does not appear to have any configuration interface. Which device is most likely being used, and why does this performance issue occur?

   • AA hub, because it forwards all frames to every port, causing collisions and reducing throughput
   • BA switch, because it floods all frames to all ports when its MAC table is full
   • CA router, because it performs NAT for all traffic, creating a bottleneck
   • DA firewall, because it inspects every packet and delays forwarding
   Reveal Solution Discussion Select an answer first
4. 8expert · medium

   A network administrator is troubleshooting intermittent connectivity issues on a network. Users report that they sometimes cannot access the internet, but they can always access internal resources. The DHCP server log shows that some clients are receiving IP addresses in the 169.254.x.x range. Which action should the administrator take first?

   • AReboot the router to clear the ARP cache
   • BVerify the DNS server settings on the clients
   • CCheck the DHCP server's availability and scope configuration
   • DCheck the default gateway configuration on the clients
   Reveal Solution Discussion Select an answer first
5. 9foundation · easy

   In which network topology is every device connected to a central hub or switch, making it easy to add new devices but creating a single point of failure at the central device?

   • AStar topology
   • BRing topology
   • CMesh topology
   • DBus topology
   Reveal Solution Discussion Select an answer first
6. 10expert · medium

   A company is deploying a wireless network for employees. The security requirement is to use the strongest available encryption and authentication method. The wireless access points support WPA2 and WPA3. Which configuration should be used?

   • AWPA2 with enterprise authentication (802.1X)
   • BWPA3 with enterprise authentication (802.1X)
   • CWPA2 with pre-shared key (PSK)
   • DWPA3 with pre-shared key (PSK)
   Reveal Solution Discussion Select an answer first