Which of the following best describes the function of unicast RPF? (Select the best answer.) A. Unicast RPF scans a packet to determine whether the packet contains malware. B. Unicast RPF verifies the reachability of the source IP address of a packet. C. Unicast RPF ensures that priority traffic is transmitted in a timely fashion. […]

Which switching method always checks for CRC errors before forwarding the frame? (Select the best answer.) A. storeandforward B. cutthrough C. adaptive cutthrough D. FragmentFree Explanation: The store-and-forward switching method always checks for cyclic redundancy check (CRC) errors before forwarding the frame, thereby ensuring reliability. When the store-and-forward switching method is used, the switch receives […]

Which of the following statements are true regarding TACACS+? (Select 2 choices.) A. TACACS+ is a standard protocol created by IETF. B. TACACS+ separates the authentication, authorization, and accounting functions of AAA. C. TACACS+ encrypts only the password in AccessRequest packets. D. TACACS+ enables administrators to control access to configuration commands. E. TACACS+ uses UDP […]

Which of the following switches will be selected as the root bridge? (Select the best answer.) A. the switch with the lowest configured IP address B. the switch with the highest configured IP address C. the switch with the lowest MAC address D. the switch with the highest MAC address E. the switch with the […]

Which of the following statements best describe why WRED is useful for networks where the majority of traffic uses TCP? (Select 2 choices.) A. TCP packets that are dropped must be retransmitted. B. TCP packets cannot arrive out of sequence. C. TCP packets have large header sizes. D. TCP sources reduce traffic flow when congestion […]

You administer the OSPF network shown in the diagram above. All interface and OSPF parameters retain their default values. Which of the following statements is true regarding the path that packets from RouterA will follow to reach RouterC? (Select the best answer.) A. All packets will flow from RouterA to RouterB to RouterC. B. All […]

You administer the partial network shown above. All of the routers run EIGRP. RouterA has the following FD and AD values for the 10.1.2.0/24 network, which is connected to RouterE: The variance is set to the default value on RouterA. Which of the following statements is correct? (Select the best answer.) A. The route through […]

Which of the following IPv6 prefixes is used for link-local unicast addresses? (Select the best answer.) A. 2000::/3 B. FC00::/8 C. FD00::/8 D. FE80::/10 E. FF00::/8 F. ::FFFF:0:0/96 Explanation: The IPv6 prefix FE80::/10 is used for link-local unicast addresses. IPv6 addresses in the FE80::/10 range begin with the characters FE80 through FEBF. Unicast packets are […]

Which of the following commands configures primary and fallback link groups for Cisco PfR? (Select the best answer.) A. border B. link-group C. pfr-map D. set link-group Explanation: The set link-group command configures primary and fallback link groups for Cisco Performance Routing (PfR). The syntax of the set linkgroup command is set linkgroup primarylinkgroupname [fallbackfallbacklinkgroupname]. […]

Which of the following does RED and WRED address? (Select the best answer.) A. tail drop B. bandwidth starvation C. bandwidth guarantees D. strict-priority queuing Explanation: Random early detection (RED) and weighted RED (WRED) are congestion avoidance mechanisms that address tail drop, which occurs when new incoming packets are dropped because a router’s queues are […]