Mar 2017 updated: Exambible Cisco 300-101 training 41-50

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2017 Mar 300-101 latest exam

Q41. A network engineer is trying to modify an existing active NAT configuration on an IOS router by using the following command: 

(config)# no ip nat pool dynamic-nat-pool 192.1.1.20 192.1.1.254 netmask 255.255.255.0 

Upon entering the command on the IOS router, the following message is seen on the console: 

%Dynamic Mapping in Use, Cannot remove message or the %Pool outpool in use, cannot destroy 

What is the least impactful method that the engineer can use to modify the existing IP NAT configuration? 

A. Clear the IP NAT translations using the clear ip nat traffic * " command, then replace the NAT configuration quickly, before any new NAT entries are populated into the translation table due to active NAT traffic. 

B. Clear the IP NAT translations using the clear ip nat translation * " command, then replace the NAT configuration quickly, before any new NAT entries are populated into the translation table due to active NAT traffic. 

C. Clear the IP NAT translations using the reload command on the router, then replace the NAT configuration quickly, before any new NAT entries are populated into the translation table due to active NAT traffic. 

D. Clear the IP NAT translations using the clear ip nat table * " command, then replace the NAT configuration quickly, before any new NAT entries are populated into the translation table due to active NAT traffic. 

Answer:

Explanation: 


Q42. PPPoE is composed of which two phases? 

A. Active Authentication Phase and PPP Session Phase 

B. Passive Discovery Phase and PPP Session Phase 

C. Active Authorization Phase and PPP Session Phase 

D. Active Discovery Phase and PPP Session Phase 

Answer:

Explanation: 

PPPoE is composed of two main phases:

Active Discovery Phase--In this phase, the PPPoE client locates a PPPoE server, called an access

concentrator. During this phase, a Session ID is assigned and the PPPoE layer is established.

PPP Session Phase--In this phase, PPP options are negotiated and authentication is performed. Once the

link setup is completed, PPPoE functions as a Layer 2 encapsulation method, allowing data to be transferred over the PPP link within PPPoE headers.

Reference: 

http://www.cisco.com/c/en/us/td/docs/security/asa/asa92/configuration/vpn/asa-vpn- cli/vpn-pppoe.html

Topic 3, Layer 3 Technologies 

20. Refer to the exhibit. 

Which one statement is true? 

A. Traffic from the 172.16.0.0/16 network will be blocked by the ACL. 

B. The 10.0.0.0/8 network will not be advertised by Router B because the network statement for the 10.0.0.0/8 network is missing from Router B. 

C. The 10.0.0.0/8 network will not be in the routing table on Router B. 

D. Users on the 10.0.0.0/8 network can successfully ping users on the 192.168.5.0/24 network, but users on the 192.168.5.0/24 cannot successfully ping users on the 10.0.0.0/8 network. 

E. Router B will not advertise the 10.0.0.0/8 network because it is blocked by the ACL. 

Answer:

Explanation: 

You can filter what individual routes are sent (out) or received (in) to any interface within your EIGRP

configuration.

One example is noted above. If you filter outbound, the next neighbor(s) will not know about anything

except the 172.16.0.0/16 route and therefore won't send it to anyone else downstream. If you filter inbound, YOU won't know about the route and therefore won't send it to anyone else downstream.


Q43. Which parameter in an SNMPv3 configuration offers authentication and encryption? 

A. auth 

B. noauth 

C. priv 

D. secret 

Answer:

Explanation: 


Q44. Which statement is true about the PPP Session Phase of PPPoE? 

A. PPP options are negotiated and authentication is not performed. Once the link setup is completed, PPPoE functions as a Layer 3 encapsulation method that allows data to be transferred over the PPP link within PPPoE headers. 

B. PPP options are not negotiated and authentication is performed. Once the link setup is completed, PPPoE functions as a Layer 4 encapsulation method that allows data to be transferred over the PPP link within PPPoE headers. 

C. PPP options are automatically enabled and authorization is performed. Once the link setup is completed, PPPoE functions as a Layer 2 encapsulation method that allows data to be encrypted over the PPP link within PPPoE headers. 

D. PPP options are negotiated and authentication is performed. Once the link setup is completed, PPPoE functions as a Layer 2 encapsulation method that allows data to be transferred over the PPP link within PPPoE headers. 

Answer:

Explanation: 

PPPoE is composed of two main phases:

Active Discovery Phase--In this phase, the PPPoE client locates a PPPoE server, called an access concentrator. During this phase, a Session ID is assigned and the PPPoE layer is established.

PPP Session Phase--In this phase, PPP options are negotiated and authentication is performed. Once the

link setup is completed, PPPoE functions as a Layer 2 encapsulation method, allowing data to be transferred over the PPP link within PPPoE headers.

Reference: 

http://www.cisco.com/c/en/us/td/docs/security/asa/asa92/configuration/vpn/asa-vpn- cli/vpnpppoe.html


Q45. An engineer executes the ip flow ingress command in interface configuration mode. What is the result of this action? 

A. It enables the collection of IP flow samples arriving to the interface. 

B. It enables the collection of IP flow samples leaving the interface. 

C. It enables IP flow while disabling IP CEF on the interface. 

D. It enables IP flow collection on the physical interface and its subinterfaces. 

Answer:

Explanation: 


Renovate 300-101 pdf exam:

Q46. Which protocol uses dynamic address mapping to request the next-hop protocol address for a specific connection? 

A. Frame Relay inverse ARP 

B. static DLCI mapping 

C. Frame Relay broadcast queue 

D. dynamic DLCI mapping 

Answer:

Explanation: 

Dynamic address mapping uses Frame Relay Inverse ARP to request the next-hop protocol address for a

specific connection, given its known DLCI. Responses to

Inverse ARP requests are entered in an address-to-DLCI mapping table on the router or access server; the

table is then used to supply the next-hop protocol

address or the DLCI for outgoing traffic.

Reference:

http://www.cisco.com/c/en/us/td/docs/ios/12_2/wan/configuration/guide/fwan_c/wcffrely.html


Q47. Scenario: 

You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation. The customer has disabled your access to the show running-config command. 

How many times was SPF algorithm executed on R4 for Area 1? 

A. 1 

B. 5 

C. 9 

D. 20 

E. 54 

F. 224 

Answer:

Explanation: 


Q48. A network engineer is trying to implement broadcast-based NTP in a network and executes the ntp broadcast client command. Assuming that an NTP server is already set up, what is the result of the command? 

A. It enables receiving NTP broadcasts on the interface where the command was executed. 

B. It enables receiving NTP broadcasts on all interfaces globally. 

C. It enables a device to be an NTP peer to another device. 

D. It enables a device to receive NTP broadcast and unicast packets. 

Answer:

Explanation: 

The NTP service can be activated by entering any ntp command. When you use the ntp broadcast client

command, the NTP service is activated (if it has not already been activated) and the device is configured to receive NTP broadcast packets on a specified interface simultaneously.

Command Description

ntp broadcast Allows the system to receive NTP broadcast packets on an client interface.

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/bsm/command/bsm-xe-3se-3850- cr-book/

bsm-xe-3se-3850-cr-book_chapter_00.html


Q49. Refer to the exhibit. When summarizing these routes, which route is the summarized route? 

A. OI 2001:DB8::/48 [110/100] via FE80::A8BB:CCFF:FE00:6F00, Ethernet0/0 

B. OI 2001:DB8::/24 [110/100] via FE80::A8BB:CCFF:FE00:6F00, Ethernet0/0 

C. OI 2001:DB8::/32 [110/100] via FE80::A8BB:CCFF:FE00:6F00, Ethernet0/0 

D. OI 2001:DB8::/64 [110/100] via FE80::A8BB:CCFF:FE00:6F00, Ethernet0/0 

Answer:

Explanation: 


Q50. Under which condition does UDP dominance occur? 

A. when TCP traffic is in the same class as UDP 

B. when UDP flows are assigned a lower priority queue 

C. when WRED is enabled 

D. when ACLs are in place to block TCP traffic 

Answer:

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:

Explanation: 

Enabling PPPoE in a VPDN Group

Perform this task to enable PPPoE in a virtual private dial-up network (VPDN) group.

Restrictions

This task applies only to releases prior to Cisco IOS Release 12.2(13)T.

SUMMARY STEPS

1.enable

2.configure terminal

3.vpdn enable

4.vpdn-group name

5.request-dialin

6.protocol pppoe DETAILED STEPS Command or Action Purpose Step 1 enable Enables privileged EXEC

mode. Example: · Enter your password if Router> enable prompted. Step 2 configure terminal Enters

global configuration mode. Example: Router# configure terminal Step 3 vpdn enable Enables virtual private

dialup Example: networking. Router(config)# vpdn enable Step 4 vpdn-group name Associates a VPDN

group with a Example: customer or VPDN profile. Router(config)# vpdn-group group1 Step 5 request-dialin

Creates a request-dialin VPDN Example: subgroup. Router(config-vpdn)# request-dialin Step 6 protocol

pppoe Enables the VPDN subgroup to Example: establish PPPoE Router(config-vpdn-req-in)# pro tocol

pppoe

Reference:

http://www.cisco.com/en/US/docs/ios/12_2t/12_2t2/feature/guide/ftpppoec_support_TSD_Island

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