In the Active Discovery phase of PPPoE, which of the following is NOT verified by the Broadband Network gateway (BNG) to prevent spoofing? A. source MAC address B. arriving access interface C. PPPoE session ID D. destination MAC address Explanation: The destination MAC address is the address of the BNG, so there is no need […]

You are configuring a 6to4 tunnel. You want to translate the IPv4 address 192.168.50.4 to the IPv6 address for the tunnel. What would be the correct translation? A. 2002:c0a8:3204::/16 B. 2002:c0a8:9901::/48 C. 2002:c0a8:3204::/48 D. c0a8:3204:2002::/16 Explanation: When implementing an automatic 6to4 tunnel, each IPv6 site receives a /48-bit prefix. The hexadecimal equivalent of the IPv4 […]

You just discovered that a ping packet sent from one of the devices to another took a different path in the return than it did on its way to the destination. What behavior caused this? A. Windowing B. Global synchronization C. MSS D. Asymmetric routing Explanation: This behavior is caused by asymmetric routing. This is […]

Which of the following are valid IPv4 to IPv6 migration strategies? (Choose two.) A. DHCP B. Tunnels C. Dual-stack D. Encapsulating IPv4 into IPv6 Explanation: Tunnels and dual-stack are valid IPv4 to IPv6 migration strategies. Tunneling mechanisms can transport IPv6 across an IPv4 infrastructure. Cisco supports the following types of tunneling for this purpose: • […]

Which of the following statements is TRUE concerning a 6to4 tunnel? A. The IPv6 packet is encapsulated in an IPv4 packet using an IPv4 protocol type of 41. B. The 6to4 tunnel method includes a 20-byte IPv6 header with no options and an IPv4 payload. C. The maximum transmission unit is increased by 20 octets […]

Refer to the following set of commands: Which of the following statements is TRUE about the given set of commands? A. IPv4 and IPv6 are running simultaneously on rtrA B. The IPv4 address is translated to an IPv6 address C. The IPv6 address is an IPv4-compatible address D. A tunnel is created for the interoperability […]

You have been alerted that TCP traffic leaving an interface has been reduced to near zero, while UDP traffic is steadily increasing at the same time. What is this behavior called and what causes it? A. jitter, caused by lack of QoS B. latency, caused by the MTU C. starvation, caused improper configuration of QoS […]

You have been alerted that TCP traffic leaving an interface has been reduced to near zero, while UDP traffic is steadily increasing at the same time. What is this behavior called and what causes it? A. jitter, caused by lack of QoS B. latency, caused by the MTU C. starvation, caused improper configuration of QoS […]

Examine the following output. What possible reason(s) can cause the state of the first entry in the adjacency table? (Choose all that apply.) A. the interface is a multipoint interface B. the clear ip arp command was executed C. the Layer 3 information is unknown D. the clear adjacency command was executed Explanation: If either […]

Which of the following statements represent characteristics of an automatic 6to4 tunnel through an IPv4 network? (Choose all that apply.) A. There is a NAT-PT router on either end of the tunnel. B. There is a dual stack router on either end of the tunnel. C. Each 6to4 site will have a /48 prefix. D. […]