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A network administrator installed a new VLAN to the network after a company added an additional floor to the office. Users are unable to obtain an IP address on the new VLAN, but ports on existing VLANs are working properly. Which of the following configurations should the administrator update?
- A. Scope size
- B. Address reservations
- C. Lease time
- D. IP helper
A network engineer needs to add a boundary network to isolate and separate the internal network from the public-facing internet. Which of the following security defense solutions would best accomplish this task?
- A. Trusted zones
- B. URL filtering
- C. ACLs
- D. Screened subnet
A network technician is attempting to harden a commercial switch that was recently purchased. Which of the following hardening techniques best mitigates the use of publicly available information?
A. Changing the default password
B. Blocking inbound SSH connections
C. Removing the gateway from the network configuration
D. Restricting physical access to the switch
A security engineer is trying to connect cameras to a 12-port PoE switch, but only eight cameras turn on. Which of the following should the engineer check first?
A. Ethernet cable type
B. Voltage
C. Transceiver compatibility
D. DHCP addressing
A firewall administrator is mapping a server’s internal IP address to an external IP address for public use. Which of the following is the name of this function?
A. NAT
B. VIP
C. PAT
D. BGP
Which of the following troubleshooting steps would provide a change advisory board with the information needed to make a decision?
A. Identify the problem.
B. Develop a theory of probable cause.
C. Test the theory to determine cause.
D. Establish a plan of action.
Which of the following will allow secure, remote access to internal applications?
A. VPN
B. CDN
C. SAN
D. IDS
A network administrator is connecting two Layer 2 switches in a network. These switches must transfer data in multiple networks.
- A. Jumbo frames
- B. 802.1Q tagging
- C. Native VLAN
- D. Link aggregation
A user’s home mesh wireless network is experiencing latency issues. A technician has:
• Performed a speed test.
• Rebooted the devices.
• Performed a site survey.
• Performed a wireless packet capture.
The technician reviews the following information:
The technician notices in the packet capture that frames were retransmitted.
Which of the following is the most likely cause of the user’s network issue?
A. The SSIDs should not be the same.
B. The network has too much overlap.
C. The devices are incompatible with the mesh network.
D. The nodes are underpowered.
Which of the following is used to estimate the average life span of a device?
- A. RTO
- B. RPO
- C. MTBF
- D. MTTR
After a company installed a new IPS, the network is experiencing speed degradation. A network administrator is troubleshooting the issue and runs a speed test.
The results from the different network locations are as follows:
LocationSpeed DownSpeed Up
Wireless laptop4.8 Mbps47.1 Mbps
Wired desktop5.2 Mbps49.3 Mbps
Firewall48.8 Mbps49.5 Mbps
Which of the following is the most likely issue?
A. Packet loss
B. Bottlenecking
C. Channel overlap
D. Network congestion