400-101 Exam Questions - Online Test

400-101 Premium VCE File

Learn More 100% Pass Guarantee - Dumps Verified - Instant Download
150 Lectures, 20 Hours

Act now and download your Cisco ccie 400 101 test today! Do not waste time for the worthless Cisco passleader 400 101 tutorials. Download Updated Cisco CCIE Routing and Switching (v5.0) exam with real questions and answers and begin to learn Cisco 400 101 dumps with a classic professional.

Q161. Refer to the exhibit. 

All switches have default bridge priorities, and originate BPDUs with MAC addresses as indicated. The numbers shown are STP link metrics. 

After STP converges, you discover that traffic from switch SWG toward switch SWD takes a less optimal path. What can you do to optimize the STP tree in this switched network? 

A. Change the priority of switch SWA to a lower value than the default value. 

B. Change the priority of switch SWB to a higher value than the default value. 

C. Change the priority of switch SWG to a higher value than the default value. 

D. Change the priority of switch SWD to a lower value than the default value. 

Answer: D 

Explanation: 

In this topology, we see that all port paths and priorities are the same, so the lowest MAC address will be used to determine the best STP path. From SWG, SWE will be chosen as the next switch in the path because it has a lower MAC address than SWF. From SWE, traffic will go to SWC because it has a lower MAC address, and then to SWD, instead of going from SWE directly to SWD. If we lower the priority of SWD (lower means better with STP) then traffic will be sent directly to SWD. 

Q162. Which TCP mechanism prevents the sender from sending data too quickly for the receiver to process? 

A. Congestion control 

B. Error detection 

C. Selective acknowledgement 

D. Flow control 

Answer: D 

Explanation: 

In data communications, flow control is the process of managing the rate of data transmission between two nodes to prevent a fast sender from overwhelming a slow receiver. It provides a mechanism for the receiver to control the transmission speed, so that the receiving node is not overwhelmed with data from transmitting node. 

Reference: http://en.wikipedia.org/wiki/Flow_control_(data) 

Q163. Which BGP feature enables you to install a backup path in the forwarding table? 

A. soft reconfiguration 

B. prefix independent convergence 

C. route refresh 

D. synchronization 

Answer: B 

Explanation: 

To install a backup path into the forwarding table and provide prefix independent convergence (PIC) in case of a PE-CE link failure, use the additional-paths install backup command in an appropriate address family configuration mode. To prevent installing the backup path, use the no form of this command. To disable prefix independent convergence, use the disable keyword. 

Reference: http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-2/routing/command/reference/b_routing_cr42crs/b_routing_cr42crs_chapter_01.html 

Q164. Which three statements about SPAN traffic monitoring are true? (Choose three.) 

A. Traffic from a non-source VLAN is discarded when it arrives on a source VLAN. 

B. Multiple sessions can send traffic to an individual destination port. 

C. It supports up to 32 SPAN ports per switch. 

D. The destination port acts as a normal switchport. 

E. It supports up to 64 SPAN ports per switch. 

F. Only one session can send traffic to an individual destination port. 

Answer: A,E,F 

Explanation: 

You can create up to a total of 64 SPAN and ERSPAN sessions to define sources and destinations on the local device.You can also create a SPAN session to monitor multiple VLAN sources and choose only VLANs of interest to transmit on multiple destination ports. 

For example, you can configure SPAN on a trunk port and monitor traffic from different VLANs on different destination ports. 

You can configure a particular destination port in only one SPAN session. 

Traffic from a non-source VLAN is discarded when it arrives on a source VLAN. 

Reference: 

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/4_0/troubleshooti 

ng/configuration/guide/n1000v_troubleshooting/trouble_15span.html 

Q165. A network engineer wants to add a new switch to an existing switch stack. Which configuration must be added to the new switch before it can be added to the switch stack? 

A. No configuration must be added. 

B. stack ID 

C. IP address 

D. VLAN information 

E. VTP information 

Answer: A 

Q166. Refer to the exhibit. 

Which BGP feature allows R1 to send R2 a list of prefixes that R2 is prevented from advertising to R1? 

A. route refresh 

B. Prefix-Based Outbound Route Filtering 

C. distribute lists 

D. prefix lists 

Answer: B 

Q167. With AutoInstall, which mechanism allows for automatic addressing of the serial interface using HDLC? 

A. ARP 

B. BOOTP 

C. DHCP 

D. SLARP 

Answer: D 

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: A 

Q169. Which three statements are true about PPP CHAP authentication? (Choose three.) 

A. PPP encapsulation must be enabled globally. 

B. The LCP phase must be complete and in closed state. 

C. The hostname used by a router for CHAP authentication cannot be changed. 

D. PPP encapsulation must be enabled on the interface. 

E. The LCP phase must be complete and in open state. 

F. By default, the router uses its hostname to identify itself to the peer. 

Answer: D,E,F 

Explanation: 

Point-to-Point Protocol (PPP) authentication issues are one of the most common causes for dialup link failures. This document provides some troubleshooting procedures for PPP authentication issues. 

Prerequisites 

. Enable PPP encapsulation 

. The PPP authentication phase does not begin until the Link Control Protocol (LCP) phase is complete and is in the open state. If debug ppp negotiation does not indicate that LCP is open, troubleshoot this issue before proceeding. 

Note. By default, the router uses its hostname to identify itself to the peer. However, this CHAP username can be changed through the ppp chap hostname command. 

Reference: http://www.cisco.com/c/en/us/support/docs/wan/point-to-point-protocol-ppp/25647-understanding-ppp-chap.html 

Q170. DRAG DROP 

Drag and drop each SNMP security model and level on the left to the corresponding mode of authentication on the right. 

Answer: