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Q51. Which option is the most effective action to avoid packet loss due to microbursts? 

A. Implement larger buffers. 

B. Install a faster CPU. 

C. Install a faster network interface. 

D. Configure a larger tx-ring size. 



You can't avoid or prevent them as such without modifying the sending host's application/network stack so it smoothes out the bursts. However, you can manage 

microbursts by tuning the size of receive buffers / rings to absorb occasional microbursts. 

Q52. Refer to the exhibit. 

Which log levels are enabled for the console? 

A. informational only 

B. informational and debugging 

C. informational, debugging, notifications, warnings, errors, critical, alerts, and emergencies 

D. informational, notifications, warnings, errors, critical, alerts, and emergencies 



Drag and drop the Metro Ethernet circuit on the left to the corresponding Service Type category on the right. 


Q54. Which two operating modes does VPLS support? (Choose two.) 

A. transport mode 

B. strict mode 

C. port mode 

D. loose mode 

E. VLAN mode 

F. dynamic mode 

Answer: C,E 

Q55. Which two statements about redistribution are true? (Choose two.) 

A. When BGP traffic is redistributed into OSPF, the metric is set to 1 unless the metric is defined. 

B. When EIGRP routes on a CE are redistributed through a PE into BGP, the Cost Community POI is set automatically. 

C. When OSPF traffic is redistributed into BGP, internal and external routes are redistributed. 

D. When BGP traffic is redistributed into OSPF, eBGP and iBGP routes are advertised. 

E. iBGP routes automatically redistribute into the IGP if the routes are in the routing table. 

F. When EIGRP traffic is redistributed into BGP, a default metric is required. 

Answer: A,B 


Drag and drop the argument of the mls ip cef load-sharing command on the left to the function it performs on the right. 



Drag and drop the BGP state on the left to the action that defines it on the right. 


Q58. Refer to the exhibit. 

R1, R2, and R3 have full network connectivity to each other, but R2 prefers the path through R3 to reach network Which two actions can you take so that R2 prefers the path through R1 to reach (Choose two.) 

A. Set the reference bandwidth to 10000 on R1, R2, and R3. 

B. Configure the cost on the link between R1 and R3 to be greater than 100 Mbps. 

C. Set the reference bandwidth on R2 only. 

D. Configure a manual bandwidth statement with a value of 1 Gbps on the link between R1 and R3. 

E. Modify the cost on the link between R1 and R2 to be greater than 10 Gbps. 

F. Configure a manual bandwidth statement with a value of 100 Mbps on the link between R1 and R2. 

Answer: A,B 


By default, the reference bandwidth used in Cisco routers is 100Mbps, so FastEthernet and above will have a cost of 1, so a gigabit interface and 10GE interface will be equal with a fastethernet. This is not ideal. If we change the reference bandwidth to 100000 then the faster links will be used. Changing the reference bandwidth needs to be done on all routers in the OSPF network. Increasing the cost on the R1-R3 link will also cause the traffic to take the more direct route. 

Q59. Which three options are three of the default EIGRP administrative distances? (Choose three.) 

A. Internal, 90 

B. External, 170 

C. Summary, 5 

D. Outside Local, 100 

E. Inside Local, 180 

F. Inside Global, 1 

Answer: A,B,C 


The following table lists the default administrative distances for various routing protocols used on Cisco routers. 

Routing Protocol 

Administrative distance 

Directly connected interface 

Static route out an interface 

Static route to next-hop address 

DMNR - Dynamic Mobile Network Routing 

EIGRP summary route 

External BGP 


Internal EIGRP 








Routing Information Protocol (RIP) 


Exterior Gateway Protocol (EGP) 


On Demand Routing (ODR) 


External EIGRP 


Internal BGP 


Floating Static Route (ex. DHCP-learned) 





Q60. Which regular expression will only allow prefixes that originated from AS 65000 and that are learned through AS 65001? 

A. ^65000_65001$ 

B. 65000_65001$ 

C. ^65000_65001 

D. ^65001_65000$ 



The following table lists the regular expressions and their meanings: 




| ^ | Start of string | 


| $ | End of string | 


| [] | Range of characters | 


| - | Used to specify range ( i.e. [0-9] ) | 


| ( ) | Logical grouping | 


| . | Any single character | 


| * | Zero or more instances | 


| + | One or more instance | 


| ? | Zero or one instance | 


| _ | Comma, open or close brace, open or close | 

| | parentheses, start or end of string, or space | 


Some commonly used regular expressions include: 


| Expression | Meaning | 


| .* | Anything | 


| ^$ | Locally originated routes | 


| ^100_ | Learned from AS 100 | 


| _100$ | Originated in AS 100 | 


| _100_ | Any instance of AS 100 | 


| ^[0-9]+$ | Directly connected ASes | 



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