IP Services

Match each Quality of Service (QoS) mechanism or Per-Hop Behavior (PHB) on the left to its corresponding operational characteristic or header specification on the right.

A network administrator is documenting Syslog severity level definitions for an enterprise Cisco IOS router deployment. Place the following Syslog severity level names in sequence from the lowest numerical severity code (most critical) to the highest numerical severity code (least critical).

A network operations team requires a Cisco IOS router to send only high-criticality log messages—specifically Emergency (severity 0), Alert (severity 1), and Critical (severity 2)—to a central syslog server at IP address 10.1.1.50. Simultaneously, the router must retain all messages up to the Informational level (severity 6) in local system RAM. Which set of commands correctly achieves this configuration?

A host PC on a local subnet connects to router interface GigabitEthernet0/0, which is configured with IP address $192.168.100.1/24$ and the command `ip helper-address 10.50.1.10`. When the host broadcasts a DHCP DISCOVER message, the router performs DHCP relay operations. Which source and destination IP addresses are placed in the Layer 3 IP header of the unicast packet forwarded by the router to the DHCP server?

A network administrator configures Low Latency Queuing (LLQ) on a Cisco WAN router egress interface using Modular QoS CLI (MQC). The policy map contains a `priority` command allocated $128\text{ kbps}$ for Expedited Forwarding (EF) voice traffic and a `bandwidth` command allocated $512\text{ kbps}$ for Assured Forwarding (AF31) transactional data. During a link congestion event, voice traffic arrives at a sustained rate of $200\text{ kbps}$. Which statement accurately describes how the router processes the excess voice traffic beyond the allocated $128\text{ kbps}$?

A network administrator is deploying SSH version 2 for secure management on a Layer 3 switch named HQ-AggSwitch01. The switch already has a non-default hostname configured and local user accounts created. Which TWO configuration steps must be completed to successfully enable SSH version 2 and restrict remote management access strictly to SSH on the virtual terminal lines? (Select TWO.)

A DHCP client host holding an active IPv4 address lease reaches 50 percent of its designated lease duration (expiration of the T1 timer). In what sequence do the client and server execute the operational steps required to successfully renew the existing IP lease?

A network administrator configures a Cisco IOS router interface with the `ip helper-address 10.1.1.50` command to support clients on subnets without a local DHCP server. Which two actions does the router perform upon receiving a DHCPDISCOVER broadcast message from a client host on that interface? (Select two.)

Host devices connected to an access switch on VLAN 15 ($172.16.15.0/24$) are failing to receive automatic IPv4 address assignments. Router R1 serves as the default gateway via its GigabitEthernet0/0.15 subinterface, while the enterprise DHCP server is located at $10.1.1.250$ across the WAN backbone. To enable successful DHCP relay operation for hosts on VLAN 15, on which interface must the `ip helper-address 10.1.1.250` command be configured on router R1?

A network administrator is configuring a Cisco IOS router to act as a DHCP relay agent for host clients residing on VLAN 25 ($10.25.0.0/24$). The centralized DHCP server is located at IP address $10.100.1.50/24$ in a different subnet connected off interface GigabitEthernet0/0/0. Which statements regarding the operation and Cisco IOS configuration of the DHCP relay agent are correct? (Select TWO.)

A network engineer is transferring a 450 MB Cisco IOS XE system image across a high-latency WAN connection to a branch router. Initial transfer attempts using TFTP fail due to frequent timeouts and poor throughput over the lossy link. The engineer switches the process to use FTP, and the image file transfers completely without error. Which operational characteristic of FTP explains why it succeeds over high-latency, lossy connections where TFTP fails?

A host connected to VLAN 100 ($10.100.1.0/24$) broadcasts a DHCPDISCOVER packet to obtain network parameters. The client-facing gateway interface GigabitEthernet0/0/0.100 ($10.100.1.1/24$) on router R1 is configured with the command `ip helper-address 192.168.50.10`. Which operation does router R1 perform upon receiving this broadcast?

A network administrator needs to back up a Cisco IOS router's running configuration to a remote FTP server at IP address 10.1.1.50 using the username 'admin' and password 'Cisco123'. Which command correctly completes this file transfer in a single step?

A network administrator is evaluating network file transfer protocols to manage router software images and configuration backups across an enterprise network. Which TWO statements correctly describe operational differences between TFTP and FTP in a Cisco IOS environment?

An enterprise WAN link connects a remote branch office to the primary data center over a service provider connection with a contracted Committed Information Rate (CIR) of $10\text{ Mbps}$. The service provider immediately drops any bursts that exceed $10\text{ Mbps}$ at the ingress port of the provider edge router. To prevent packet drops during short bursts by queuing excess packets in memory and releasing them at a controlled rate, which Quality of Service (QoS) mechanism should be applied to the enterprise egress router interface?

Match each Quality of Service (QoS) concept or mechanism on the left to its corresponding operational characteristic or header specification on the right.

A network engineer is evaluating QoS traffic conditioning strategies for a branch connection using a sub-rate Ethernet service where the committed information rate is lower than the physical interface speed. Which two characteristics accurately distinguish traffic policing from traffic shaping in this scenario? (Select two.)

A network administrator is deploying Cisco IP Phones across an enterprise network where desktop PCs are daisy-chained to the secondary switch port on each IP Phone. Which configuration location represents the recommended placement of the QoS trust boundary to prevent PC traffic from spoofing high-priority Layer 2 CoS values while ensuring voice packets are appropriately prioritized?