IP Services

A network administrator is configuring a branch router's WAN interface (GigabitEthernet0/1) to automatically obtain its IPv4 address from the ISP's DHCP server. After entering interface configuration mode, which command correctly configures the router to act as a DHCP client on that interface?

A company has a centralized DHCP server at 10.50.1.10 located in the data center. Client PCs on VLAN 20 (subnet 192.168.20.0/24) connect to a Layer 3 switch that acts as their default gateway on interface SVI Vlan20. Users on VLAN 20 report they cannot obtain IP addresses automatically, while statically configured hosts work fine. What configuration must be applied to the Layer 3 switch to resolve this?

A network engineer is configuring QoS on a campus router to prioritize voice traffic. Voice packets arriving from the IP phones must be identified and assigned a trust value near the network edge so that every downstream device applies consistent forwarding treatment. Which per-hop behavior (PHB) mechanism performs the initial identification of the voice traffic based on its characteristics before any trust value is set?

A branch router connects an internal network of 200 hosts (192.168.10.0/24) to the Internet. The ISP assigned a small block of 4 public addresses (203.0.113.4 through 203.0.113.7). The administrator must allow all 200 internal hosts to access the Internet simultaneously using these public addresses. Which NAT configuration approach should be used?

A network administrator wants router R2 to synchronize its clock with a central time source at 10.1.1.10 so that log timestamps across all devices are consistent. The administrator enters the command 'ntp server 10.1.1.10' on R2. After a few minutes, 'show ntp associations' shows the server address but the entry is not marked as synchronized, and 'show ntp status' reports the clock as unsynchronized. Assuming IP connectivity to 10.1.1.10 is confirmed, which condition would MOST likely prevent R2 from synchronizing?

A WAN administrator is configuring QoS on the edge router of a branch office. The service provider enforces a committed rate of 10 Mbps and drops any traffic exceeding that rate. The administrator wants to smooth outbound bursts so that traffic stays within the contracted rate and avoids being dropped by the provider, buffering excess packets rather than discarding them. Which QoS mechanism should be applied on the outbound interface?

A network administrator deploys an SNMP-based monitoring server for the company's routers and switches. The administrator wants the network devices to immediately notify the monitoring server whenever a critical interface goes down, rather than waiting for the server to periodically request status. Which SNMP mechanism should be configured on the devices to meet this requirement?

A network administrator is deploying SNMP to monitor core routers. Corporate security policy requires that all management traffic be both authenticated and encrypted to prevent credential theft and eavesdropping over the management network. Which SNMP configuration meets this requirement?

A company hosts an internal web server at private address 10.1.1.50 and wants Internet users to reach it consistently using the public address 203.0.113.10. The border router R1 has its LAN interface (Gi0/0) toward the server and its WAN interface (Gi0/1) toward the ISP. Which command correctly creates the required address translation on R1?

A network engineer configures a router with the command 'logging trap 4' to control which messages are sent to the central syslog server. After the change, the team notices that some previously seen messages no longer appear on the server. Which statement correctly describes what messages the router will now forward to the syslog server?