Q191. A TCP/IP host is able to transmit small amounts of data (typically less than 1500 bytes), but attempts to transmit larger amounts of data hang and then time out. What is the cause of this problem? 

A. A link is flapping between two intermediate devices. 

B. The processor of an intermediate router is averaging 90 percent utilization. 

C. A port on the switch that is connected to the TCP/IP host is duplicating traffic and sending it to a port that has a sniffer attached. 

D. There is a PMTUD failure in the network path. 

Answer:

Explanation: 

Sometimes, over some IP paths, a TCP/IP node can send small amounts of data (typically less than 1500 bytes) with no difficulty, but transmission attempts with larger amounts of data hang, then time out. Often this is observed as a unidirectional problem in that large data transfers succeed in one direction but fail in the other direction. This problem is likely caused by the TCP MSS value, PMTUD failure, different LAN media types, or defective links. 

Reference: http://www.cisco.com/c/en/us/support/docs/additional-legacy-protocols/ms-windows-networking/13709-38.html 


Q192. DRAG DROP 

Drag and drop the NHRP flag on the left to the corresponding meaning on the right. 

Answer: 


Q193. DRAG DROP 

Drag each SNMP term on the left to the matching definition on the right. 

Answer: 


Q194. DRAG DROP 

Drag and drop each step in the performance-monitoring configuration process on the left into the correct order on the right. 

Answer: 


Q195. Which option is the origin code when a route is redistributed into BGP? 

A. IGP 

B. EGP 

C. external 

D. incomplete 

E. unknown 

Answer:


Q196. Which three statements about the differences between Cisco IOS and IOS-XE functionality are true? (Choose three.) 

A. Only IOS-XE Software can host applications outside of the IOS context. 

B. Only the IOS-XE Services Plane has multiple cores. 

C. Only the IOS-XE Data Plane has multiple cores. 

D. Only the IOS-XE Control Plane has multiple cores. 

E. Only IOS-XE module management integrates with packet processing. 

F. Only IOS-XE configuration and control is integrated with the kernel. 

Answer: A,B,C 


Q197. Which two statements about MPLS VPNs are true? (Choose two.) 

A. PE routers maintain customer routes in the VPN for that customer. 

B. They use the explicit-null label by default. 

C. P routers are used only for label transit. 

D. P routers maintain customer routes in the VPN for that customer. 

E. They support only one route target. 

F. Each interface on a PE router must have its own VRF. 

Answer: A,C 


Q198. For which feature is the address family "rtfilter" used? 

A. Enhanced Route Refresh 

B. MPLS VPN filtering 

C. Route Target Constraint 

D. Unified MPLS 

Answer:

Explanation: 

With Multiprotocol Label Switching (MPLS) VPN, the internal Border Gateway Protocol (iBGP) peer or Route Reflector (RR) sends all VPN4 and/or VPN6 prefixes to the PE routers. The PE router drops the VPN4/6 prefixes for which there is no importing VPN routing and forwarding (VRF). This is a behavior where the RR sends VPN4/6 prefixes to the PE router, which it does not need. This is a waste of processing power on the RR and the PE and a waste of bandwidth. With Route Target Constraint (RTC), the RR sends only wanted VPN4/6 prefixes to the PE. 'Wanted' means that the PE has VRF importing the specific prefixes. RFC 4684 specifies Route Target Constraint (RTC). The support is through a new address family rtfilter for both VPNv4 and VPNv6. 

Reference: http://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching-mpls/mpls/116062-technologies-technote-restraint-00.html 


Q199. What is the maximum number of classes that MQC can support in a single policy map? 

A. 512 

B. 256 

C. 128 

D. 64 

Answer:


Q200. What is the most efficient way to confirm whether microbursts of traffic are occurring? 

A. Monitor the output traffic rate using the show interface command. 

B. Monitor the output traffic rate using the show controllers command. 

C. Check the CPU utilization of the router. 

D. Sniff the traffic and plot the packet rate over time. 

Answer:

Explanation: 

Micro-bursting is a phenomenon where rapid bursts of data packets are sent in quick succession, leading to periods of full line-rate transmission that can overflow packet buffers of the network stack, both in network endpoints and routers and switches inside the network. In order to troubleshoot microbursts, you need a packet sniffer that can capture traffic over a long period of time and allow you to analyze it in the form of a graph which displays the saturation points (packet rate during microbursts versus total available bandwidth). You can eventually trace it to the source causing the bursts (e.g. stock trading applications). 

Reference: Adam, Paul (2014-07-12). All-in-One CCIE V5 Written Exam Guide (Kindle Locations 989-994). Kindle Edition.