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2017 Apr 400-101 free practice questions

Q121. Refer to the exhibit. 

Which two statements about the R1 configuration are true? (Choose two.) 

A. The IP TTL value is copied to the MPLS field during label imposition. 

B. The structure of the MLPS network is hidden in a traceroute. 

C. The LDP session interval and hold times are configured for directly connected neighbors. 

D. R1 protects the session for 86400 seconds. 

E. All locally assigned labels are discarded. 

Answer: B,D 

Q122. Where must the spanning-tree timers be configured if they are not using the default timers? 

A. They must be on the root bridge. 

B. They must be on any non-root bridge. 

C. Changing the default timers is not allowed. 

D. Timers must be modified manually on each switch. 


Q123. Refer to the exhibit. 

Which statement about the output is true? 

A. The flow is an HTTPS connection to the router, which is initiated by 

B. The flow is an HTTP connection to the router, which is initiated by 

C. The flow is an HTTPS connection that is initiated by the router and that goes to 

D. The flow is an HTTP connection that is initiated by the router and that goes to 



We can see that the connection is initiated by the Source IP address shown as We also see that the destination protocol (DstP) shows 01BB, which is in hex and translates to 443 in decimal. SSL/HTTPS uses port 443. 

Q124. Which two options are the two main phases of PPPoE? (Choose two.) 

A. Active Discovery Phase 

B. IKE Phase 

C. Main Mode Phase 

D. PPP Session Phase 

E. Aggressive Mode Phase 

F. Negotiation Phase 

Answer: A,D 


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. 


Q125. Which two statements about the MAC address table space are true? (Choose two.) 

A. You can disable learning on a VLAN to reduce table-space requirements. 

B. When you disable learning on a VLAN with an SVI, IP packet flooding in the Layer 2 domain is also disabled. 

C. Unicast, multicast, and broadcast MAC address filtering is configured globally and disabled by default. 

D. The default setting for static MAC addresses to age out of the MAC address table is 300 seconds. 

E. Turning off MAC learning on VLANs 900 through 1005 disables learning on VLANs 900 through 1001. 

Answer: A,E 

Replace 400-101 free download:

Q126. In which type of EIGRP configuration is EIGRP IPv6 VRF-Lite available? 

A. stub 

B. named mode 

C. classic mode 

D. passive 



The EIGRP IPv6 VRF Lite feature provides EIGRP IPv6 support for multiple VRFs. EIGRP for IPv6 can operate in the context of a VRF. The EIGRP IPv6 VRF Lite feature provides 

separation between routing and forwarding, providing an additional level of security because no communication between devices belonging to different VRFs is allowed unless it is explicitly configured. The EIGRP IPv6 VRF Lite feature simplifies the management and troubleshooting of traffic belonging to a specific VRF. The EIGRP IPv6 VRF Lite feature is available only in EIGRP named configurations. 


Q127. The no ip unreachables command is configured on interfaces to protect the control plane of a router. 

Which mechanism is impacted by using this command? 

A. ICMP redirects 

B. path MTU discovery 

C. source routing 

D. ICMP router discovery protocol 


Q128. Which two statements about route summarization are true? (Choose two.)

A. RIP, IGRP, and EIGRP can automatically summarize routing information at network address boundaries. 

B. EIGRP can automatically summarize external routes. 

C. The area range command can aggregate addresses on the ASBR. 

D. The summary-address command under the router process configures manual summarization on RIPv2 devices. 

E. The ip classless command enables classful protocols to select a default route to an unknown subnet on a network with other known subnets. 

Answer: A,E 


Drag and drop the OSPFv3 LSA type on the left to the functionality it provides on the right. 


Q130. Refer to the exhibit. 

Which two routes are included in the route update? (Choose two.) 






Answer: C,D 


This access list will permit the,,, and subnets.