Answer: A 

Explanation: 

Explanation: Mixing TCP with UDP It is a general best practice to not mix TCP-based traffic with UDPbased

traffic (especially Streaming-Video) within a single service-provider class because of the behaviors

of these protocols during periods of congestion. Specifically, TCP transmitters throttle back flows when

drops are detected. Although some UDP applications have application-level windowing, flow control, and

retransmission capabilities, most UDP transmitters are completely oblivious to drops and, thus, never lower

transmission rates because of dropping. When TCP flows are combined with UDP flows within a single

service-provider class and the class experiences congestion, TCP flows continually lower their

transmission rates, potentially giving up their bandwidth to UDP flows that are oblivious to drops. This

effect is called TCP starvation/UDP dominance. TCP starvation/UDP dominance likely occurs if (TCP-based) Mission-Critical Data is assigned to the same service-provider class as (UDP-based) Streaming-

Video and the class experiences sustained congestion. Even if WRED is enabled on the service-provider

class, the same behavior would be observed because WRED (for the most part) manages congestion only

on TCP-based flows. Reference: http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/

WAN_and_MAN/QoS_SRND/QoS- SRND-Book/VPNQoS.html

Topic 2, Layer 2 Technologies 

13. Prior to enabling PPPoE in a virtual private dialup network group, which task must be completed? 

A. Disable CDP on the interface. 

B. Execute the vpdn enable command. 

C. Execute the no switchport command. 

D. Enable QoS FIFO for PPPoE support. 

Answer: B 

Explanation: 

When a router crashes, it is sometimes useful to obtain a full copy of the memory image (called a core

dump) to identify the cause of the crash. Core dumps are generally very useful to your technical support representative.

Four basic ways exist for setting up the router to generate a core dump:

Using Trivial File Transfer Protocol (TFTP)

Using File Transfer Protocol (FTP)

Using remote copy protocol (rcp)

Using a Flash disk Reference: http://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/

tr19aa.html

Answer: A 

Explanation: 

Explanation: Before you troubleshoot any OSPF neighbor-related issues on an NBMA network, it is

important to remember that an NBMA network can be configured in these modes of operation with the ip

ospf network command: Point-to-Point Point-to-Multipoint Broadcast NBMA The Hello and Dead Intervals

of each mode are described in this table: Hello Interval Dead Interval Network Type (secs) (secs) Point-to-

Point 10 40 Point-to-Multipoint 30 120 Broadcast 10 40 Non-Broadcast 30 120

Reference: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13693- 22.html

Answer: B 

Explanation: 

Answer: A 

Explanation: 

To set the secure HTTP (HTTPS) server port number for listening, use the ip http secure-port

command in global configuration mode. To return the HTTPS server port number to the default, use the no

form of this command. ip http secure-port port-number no ip http secure-port Syntax Description port-

Integer in the range of 0 to 65535 is accepted, but the port number must be number higher than 1024

unless the default is used. The default is 443. Reference: http://www.cisco.com/en/US/docs/ios-xml/ios/

https/command/nm-https-cr-cl- sh.html#wp3612805529

Answer: B 

Explanation: