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2021 Apr 400-101 exam cost

Q161. DRAG DROP 

Drag and drop the OSPF network type on the left to the correct traffic type category on the right. 

Answer: 


Q162. Which LSA type is associated with the default route in a totally stubby area? 

A. interarea-prefix LSA for ABRs (Type 3) 

B. autonomous system external LSA (Type 5) 

C. router LSA (Type 1) 

D. interarea-router LSAs for ASBRs (Type 4) 

Answer:


Q163. Which two statements about TCP are true? (Choose two.) 

A. TCP option must be divisible by 32. 

B. It has a 16-bit window size. 

C. Its maximum data offset is fifteen 32-bit words. 

D. It has a 32-bit window size. 

E. Its maximum data offset is ten 32-bit words. 

F. It has a 32-bit checksum field. 

Answer: B,C 


Q164. Refer to the exhibit. 

Two multicast domains are configured as shown and connected with MSDP, but the two 

domains are unable to communicate. Which two actions can you take to correct the problem? (Choose two.) 

A. Change the peering IP address in AS 65220 to 10.0.0.20. 

B. Change the peering AS on R2 to 65210. 

C. Verify that UDP port 639 is open. 

D. Verify that TCP port 139 is open. 

E. Change the MSDP originator-id to GigabitEthernet 0/0/0 on both routers. 

F. Change the MSDP peering IP address on R2 to 172.16.1.13. 

Answer: A,B 


Q165. Refer to the exhibit. 

Why is the router out of memory? 

A. The router is experiencing a BGP memory leak software defect. 

B. The BGP peers have been up for too long. 

C. The amount of BGP update traffic in the network is too high. 

D. The router has insufficient memory due to the size of the BGP database. 

Answer:

Explanation: 

Here we can see that this router is running out of memory due to the large size of the BGP routing database. In this case, this router is receiving over 200,000 routes from each of the 4 peers. 


Replace 400-101 actual exam:

Q166. Which three statements are true about an EtherChannel? (Choose three.) 

A. PAGP and LACP can be configured on the same switch if the switch is not in the same EtherChannel. 

B. EtherChannel ports in suspended state can receive BPDUs but cannot send them. 

C. An EtherChannel forms between trunks that are using different native VLANs. 

D. LACP can operate in both half duplex and full duplex, if the duplex setting is the same on both ends. 

E. Ports with different spanning-tree path costs can form an EtherChannel. 

Answer: A,B,E 

Explanation: 

Answer A. EtherChannel groups running PAgP and LACP can coexist on the same switch or on different switches in the stack. Individual EtherChannel groups can run either PAgP or LACP, but they cannot interoperate. 

Answer B: 

EtherChannel Member Port States 

Port States 

Description 

bundled 

The port is part of an EtherChannel and can send and receive BPDUs and data traffic. 

suspended 

The port is not part of an EtherChannel. The port can receive BPDUs but cannot send them. Data traffic is blocked. 

standalone 

The port is not bundled in an EtherChannel. The port functions as a standalone data port. The port can send and receive BPDUs and data traffic. 

Answer E. Ports with different spanning-tree path costs can form an EtherChannel if they are otherwise compatibly configured. Setting different spanning-tree path costs does not, by itself, make ports incompatible for the formation of an EtherChannel. 

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960x/software/15-0_2_EX/layer2/configuration_guide/b_lay2_152ex_2960-x_cg/b_lay2_152ex_2960-x_cg_chapter_010.html 


Q167. DRAG DROP 

Drag each spanning-tree feature on the left to the matching statement on the right. 

Answer: 


Q168. Refer to the exhibit. 

Traffic from CE1 to CE2 is traveling through the core instead of through R1. All the PE routers have a similar configuration, and BGP peering and extended-community meshing are configured correctly. 

Which configuration change routes the traffic through R1? 

A) 

B) 

C) 

D) 

A. Exhibit A 

B. Exhibit B 

C. Exhibit C 

D. Exhibit D 

Answer:


Q169. What is a reason for an EIGRP router to send an SIA reply to a peer? 

A. to respond to an SIA query with the alternative path requested 

B. to respond to a query reporting that the prefix has gone stuck-in-active 

C. to respond to an SIA query that the router is still waiting on replies from its peers 

D. to respond to a reply reporting that the prefix has gone stuck-in-active 

Answer:


Q170. When VRF-Lite is configured without BGP support,.which statement about the configuration of the route target and route distinguisher is true? 

A. The configuration of the route target and route distinguisher is required. 

B. The configuration of the route target and route distinguisher is not required. 

C. The configuration of the route target is required and the configuration of the route distinguisher is not required. 

D. The configuration of the route target is not required and the configuration of the route distinguisher is required. 

Answer: