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

Q151. Refer to the exhibit. 

All switches are Cisco switches. Assume that Cisco Discovery Protocol is enabled only on switches A and C. 

Which information is returned when you issue the command show cdp neighbors on switch C? 

A. a limited amount of information about switch B 

B. no neighbor details will be returned 

C. neighbor details for switch B 

D. neighbor details for switch A 

E. neighbor details for switch C 

Answer: B 

Explanation: 

CDP is used to discover information on directly connected neighbors only, so in this case SwitchC would only be able to obtain CDP information from SwitchB. However, since SwitchB is not running CDP then no neighbor information will be seen on SwitchC. Same goes for Switch A also in this topology. 

Q152. Refer to the exhibit. 

Which statement is true? 

A. IS-IS has been enabled on R4 for IPv6, single-topology. 

B. IS-IS has been enabled on R4 for IPv6, multitopology. 

C. IS-IS has been enabled on R4 for IPv6, single-topology and multitopology. 

D. R4 advertises IPv6 prefixes, but it does not forward IPv6 traffic, because the protocol has not been enabled under router IS-IS. 

Answer: A 

Explanation: 

When working with IPv6 prefixes in IS-IS, you can configure IS-IS to be in a single topology for both IPv4 and IPv6 or to run different topologies for IPv4 and IPv6. By default, IS-IS works in single-topology mode when activating IPv4 and IPv6. This means that the IS-IS topology will be built based on IS Reachability TLVs. When the base topology is built, then IPv4 prefixes (IP Reachability TLV) and IPv6 prefixes (IPv6 Reachability TLV) are added to each node as leaves, without checking if there is IPv6 connectivity between nodes. 

Reference: https://blog.initialdraft.com/archives/3381/ 

Q153. DRAG DROP 

Drag each MPLS term on the left to the matching statement on the right. 

Answer: 

Q154. Which timer expiration can lead to an EIGRP route becoming stuck in active? 

A. hello 

B. active 

C. query 

D. hold 

Answer: B 

Explanation: 

As noted above, when a route goes into the active state, the router queries its neighbors to find a path to the pertinent network. At this point, the router starts a three minute active timer by which time it must receive replies from all queried neighbors. If a neighbor has feasible successors for the route, it will recalculate its own local distance to the network and report this back. However, if a neighbor does not have a feasible successor, it also goes into active state. In some cases, multiple routers along multiple query paths will go into active state as routers continue to query for the desired route. In most cases, this process will yield responses from all queried routers and the sought after route will transition back into the passive state within the three minute SIA query timer. In the case that none of the queried routers can provide a feasible successor, the route is cleared. In some cases, a response is not received between two neighbor routers because of link failures, congestion or some other adverse condition in either the network or on the queried router, and the three minute active timer expires on the router originating the query. When this happens, the querying router that did not receive a response logs a “DUAL-3-SIA” or “stuck-in-active” error for the route and then drops and restarts its adjacency with the non-responding router 

Reference: http://www.packetdesign.com/resources/technical-briefs/diagnosing-eigrp-stuck-active 

Q155. Which three types of address-family configurations are supported in EIGRP named mode? (Choose three.) 

A. address-family ipv4 unicast 

B. address-family vpnv4 

C. address-family ipv6 unicast 

D. address-family ipv6 multicast 

E. address-family vpnv6 

F. address-family ipv4 multicast 

Answer: A,C,F 

Q156. Which statement about LISP encapsulation in an EIGRP OTP implementation is true? 

A. OTP uses LISP encapsulation for dynamic multipoint tunneling. 

B. OTP maintains the LISP control plane. 

C. OTP uses LISP encapsulation to obtain routes from neighbors. 

D. LISP learns the next hop. 

Answer: A 

Q157. Which two DHCP messages are always sent as broadcast? (Choose two.) 

A. DHCPOFFER 

B. DHCPDECLINE 

C. DHCPRELEASE 

D. DHCPREQUEST 

E. DHCPDISCOVER 

Answer: D,E 

Explanation: 

DHCP discovery 

The client broadcasts messages DHCPDISCOVER on the network subnet using the destination address 255.255.255.255 or the specific subnet broadcast address. 

DHCP request 

In response to the DHCP offer, the client replies with a DHCP request, broadcasts to the server, requesting the offered address. A client can receive DHCP offers from multiple servers, but it will accept only one DHCP offer. 

Reference: http://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol 

Q158. Refer to the exhibit. 

Assuming that the peer is configured correctly and the interface is up, how many neighbors will be seen in the EIGRPv6 neighbor table on this IPv6-only router? 

A. one neighbor, which will use a local router-id of 6010. AB8. . /64 

B. one neighbor, which will use a local router-id of 6020. AB8. . /64 

C. none, because EIGRPv6 only supports authenticated peers 

D. none, because of the mismatch of timers 

E. none, because there is no EIGRP router ID configured 

Answer: E 

Explanation: 

Configuring EIGRP for IPv6 has some restrictions; they are listed below: 

. The interfaces can be directly configured with EIGRP for IPv6, without the use of a global IPv6 address. There is no network statement in EIGRP for IPv6. 

. The router ID needs to be configured for an EIGRPv6 protocol instance before it can run. 

. EIGRP for IPv6 has a shutdown feature. Ensure that the routing process is in "no shut" mode to start running the protocol. 

Reference: http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/113267-eigrp-ipv6-00.html 

Q159. Which two statements about the client-identifier in a DHCP pool are true? (Choose two.) 

A. It specifies a unique identifier that is used only for DHCP requests. 

B. It is specified by appending 01 to the MAC address of a DHCP client. 

C. It specifies a hardware address for the client. 

D. It specifies a unique identifier that is used only for BOOTP requests. 

E. It requires that you specify the hardware protocol. 

Answer: A,B 

Reference: 

client-identifier unique-identifier 

Example: 

Device(dhcp-config)# client-identifier 01b7.0813.8811.66 

Specifies the unique identifier for DHCP clients. 

This command is used for DHCP requests. 

DHCP clients require client identifiers. You can specify the unique identifier for the client in either of the following ways: 

A 7-byte dotted hexadecimal notation. For example, 01b7.0813.8811.66, where 01 represents the Ethernet media type and the remaining bytes represent the MAC address of the DHCP client. 

A 27-byte dotted hexadecimal notation. For example, 7665.6e64.6f72.2d30.3032.342e.3937.6230.2e33.3734.312d.4661.302f.31. The equivalent ASCII string for this hexadecimal value is vendor-0024.97b0.3741-fa0/1, where vendor represents the vendor, 0024.97b0.3741 represents the MAC address of the source interface, and fa0/1 represents the source interface of the DHCP client. 

See the Troubleshooting Tips section for information about how to determine the client identifier of the DHCP client. 

Note 

The identifier specified here is considered for a DHCP client that sends a client identifier in the packet. 

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dhcp/configuration/15-mt/dhcp-15-mt-book/config-dhcp-server.html 

Q160. Which statement about OSPF multiaccess segments is true? 

A. The designated router is elected first. 

B. The designated and backup designated routers are elected at the same time. 

C. The router that sent the first hello message is elected first. 

D. The backup designated router is elected first. 

Answer: D 

Explanation: 

According to the RFC, the BDR is actually elected first, followed by the DR. The RFC explains why: “The reason behind the election algorithm’s complexity is the desire for an orderly transition from Backup Designated Router to Designated Router, when the current Designated Router fails. This orderly transition is ensured through the introduction of hysteresis: no new Backup Designated Router can be chosen until the old Backup accepts its new Designated Router responsibilities. The above procedure may elect the same router to be both Designated Router and Backup Designated Router, although that router will never be the calculating router (Router X) itself.” 

Reference: http://www.ietf.org/rfc/rfc2328.txt – Page 76