Cisco 400-101 zertifizierung

CCIE Routing and Switching Written Exam
Exam Number 400-101 CCIE
Associated Certifications CCIE Routing and Switching
Duration 120 Minutes (90 - 110 questions)
Available Languages English
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Exam Tutorial Review type of exam questions
NO.1 Assume that the following MAC addresses are used for the bridge ID MAC address by four
different switches in a network. Which switch will be elected as the spanning-tree root bridge?
A. SwitchA uses MAC 1000.AA-AA-AA-AA-AA-AA.
B. SwitchB uses MAC 2000.BB-BB-BB-BB-BB-BB.
C. SwitchC uses MAC 3000.CC-CC-CC-CC-CC-CC.
D. SwitchD uses MAC 4000.DD-DD-DD-DD-DD-DD.
Answer: A

Cisco Vorbereitung 400-101 testking 400-101
Explanation:
The switch with the highest switch priority (the lowest numerical priority value) is elected as the root
switch. If all switches are configured with the default priority (32768), the switch with the lowest
MAC address in the VLAN becomes the root switch.
Reference.
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/122_53_se/con
figuration/guide/2960scg/swstp.html

NO.2 Which two statements about reverse ARP are true? (Choose two.)
A. Its servers require static mappings.
B. It works with AutoInstall to configure new devices.
C. It provides IP addresses for subnet masks.
D. It provides IP addresses for default gateways.
E. It requires less maintenance than DHCP.
Answer: A,B

Cisco 400-101 prüfungsvorbereitung 400-101

NO.3 Which term describes an EIGRP route that has feasible successors?
A. active
B. passive
C. redistributed
D. invalid
Answer: B

Cisco quizfragen und antworten 400-101 Antworten 400-101 Fragenkatalog 400-101 prüfungsvorbereitung 400-101 400-101 prüfungsfrage
Explanation:
A topology table entry for a destination can have one of two states. A route is considered in the
Passive state when a router is not performing a route recomputation. The route is in Active state
when a router is undergoing a route recomputation. If there are always feasible successors, a route
never has to go into Active state and avoids a route recomputation.
When there are no feasible successors, a route goes into Active state and a route recomputation
occurs. A route recomputation commences with a router sending a query packet to all neighbors.
Neighboring routers can either reply if they have feasible successors for the destination or optionally
return a query indicating that they are performing a route recomputation. While in Active state, a
router cannot change the next-hop neighbor it is using to forward packets. Once all replies are
received for a given query, the destination can transition to Passive state and a new successor can be
selected.
Reference. http://docwiki.cisco.com/wiki/Enhanced_Interior_Gateway_Routing_Protocol

NO.4 Refer to the exhibit.
Which two corrective actions could you take if EIGRP routes from R2 fail to reach R1? (Choose two.)
A. Configure R2 to use a VRF to send routes to R1.
B. Configure the autonomous system in the EIGRP configuration of R1.
C. Correct the network statement on R2.
D. Add the interface on R1 that is connected to R2 into a VRF.
Answer: B,D

Cisco echte Fragen 400-101 400-101 antworten 400-101 Prüfungsfrage 400-101 zertifizierungsantworten
Explanation:
In this question we are running VRF Lite on R1. VRF Lite is also knows as "VRF without running MPLS".
This is an example of how to configure VRF Lite with EIGRP:
ip vrf FIRST rd 1:1 ! ip vrf SECOND rd 1:2 ! router eigrp 1 no auto-summary ! address-family ipv4 vrf
FIRST network 10.1.1.1 0.0.0.0 no auto-summary autonomous-system 200 exit-address-family !
address-family ipv4 vrf SECOND network 10.1.2.1 0.0.0.0 no auto-summary autonomous-system 100
exit-address-family ! interface FastEthernet0/0 ip vrf forwarding FIRST ip address 10.1.1.1
255.255.255.0 ! interface FastEthernet0/1 ip vrf forwarding SECOND ip address 10.1.2.1
255.255.255.0
The above example creates two VRFs (named "FIRST" and "SECOND"). VRF "FIRST" runs on EIGRP AS
200 while VRF "SECOND" runs on EIGRP AS 100. After that we have to add interfaces to the
appropriate VRFs. From this example, back to our question we can see that R1 is missing the
"autonomous-system ..." command under "address-family ipv4 vrf R2. And R1 needs an interface
configured under that VRF. Note. R2 does not run VRF at all! Usually R2 resides on customer side.

NO.5 Which option is the default maximum age of the MAC address table?
A. 300 seconds
B. 500 seconds
C. 1200 seconds
D. 3600 seconds
Answer: A

Cisco Zertifizierungsfragen 400-101 originale fragen 400-101
Explanation:
To configure the maximum aging time for entries in the Layer 2 table, use the mac-address-table
aging-time command in global configuration mode.
Syntax Description
seconds
MAC address table entry maximum age. Valid values are 0, and from 5 to 1000000 seconds. Aging
time is counted from the last time that the switch detected the MAC address. The default value is 300
seconds.
Reference.
http://www.cisco.com/c/en/us/td/docs/ios/lanswitch/command/reference/lsw_book/lsw_m1.html

NO.6 Refer to the exhibit.
A spoke site that is connected to Router-A cannot reach a spoke site that is connected to Router-B,
but both spoke sites can reach the hub. What is the likely cause of this issue?
A. There is a router doing PAT at site B.
B. There is a router doing PAT at site A.
C. NHRP is learning the IP address of the remote spoke site as a /32 address rather than a /24
address.
D. There is a routing issue, as NHRP registration is working.
Answer: B

Cisco prüfungen 400-101 echte fragen 400-101 Antworten 400-101
Explanation:
If one spoke is behind one NAT device and another different spoke is behind another NAT device, and
Peer Address Translation (PAT) is the type of NAT used on both NAT devices, then a session initiated
between the two spokes cannot be established.
Reference.
http://www.cisco.com/c/en/us/td/docs/ios/ios_xe/sec_secure_connectivity/configuration/guide/co
nv ert/sec_dmvpn_xe_3s_book/sec_dmvpn_dt_spokes_b_nat_xe.html

NO.7 Which TCP feature allows a client to request a specific packet that was lost?
A. flow control
B. sliding window
C. fast recovery
D. selective acknowledgment
Answer: D

Cisco Prüfungsunterlagen 400-101 Zertifizierungsantworten 400-101 Fragenkatalog 400-101 zertifizierung
Explanation:
The TCP Selective Acknowledgment feature improves performance if multiple packets are lost from
one TCP window of data. Prior to this feature, because of limited information available from
cumulative acknowledgments, a TCP sender could learn about only one lost packet per-round-trip
time. An aggressive sender could choose to resend packets early, but such re-sent segments might
have already been successfully received. The TCP selective acknowledgment mechanism helps
improve performance. The receiving TCP host returns selective acknowledgment packets to the
sender, informing the sender of data that has been received. In other words, the receiver can
acknowledge packets received out of order. The sender can then resend only missing data segments
(instead of everything since the first missing packet). Prior to selective acknowledgment, if TCP lost
packets 4 and 7 out of an 8-packet window, TCP would receive acknowledgment of only packets 1, 2,
and 3. Packets 4 through 8 would need to be re-sent. With selective acknowledgment, TCP receives
acknowledgment of packets 1, 2, 3, 5, 6, and 8. Only packets 4 and 7 must be re-sent. TCP selective
acknowledgment is used only when multiple packets are dropped within one TCP window. There is
no performance impact when the feature is enabled but not used. Use the ip tcp selective-ack
command in global configuration mode to enable TCP selective acknowledgment.
Refer to RFC 2018 for more details about TCP selective acknowledgment.

NO.8 A GRE tunnel is down with the error message %TUN-5-RECURDOWN:
Tunnel0 temporarily disabled due to recursive routing error.
Which two options describe possible causes of the error? (Choose two.)
A. Incorrect destination IP addresses are configured on the tunnel.
B. There is link flapping on the tunnel.
C. There is instability in the network due to route flapping.
D. The tunnel mode and tunnel IP address are misconfigured.
E. The tunnel destination is being routed out of the tunnel interface.
Answer: C,E

Cisco exam fragen 400-101 400-101 Prüfungsfragen 400-101 prüfungen
Explanation:
The %TUN-5-RECURDOWN: Tunnel0 temporarily disabled due to recursive routing error message
means that the generic routing encapsulation (GRE) tunnel router has discovered a recursive routing
problem. This condition is usually due to one of these causes:
Reference. http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-
routingprotocol-eigrp/22327-gre-flap.html

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Exam Code: 400-101
Prüfungsname: CCIE Routing and Switching Written Exam v5.0
Aktulisiert: 16-08-2015, 400-101 testantworten
Nummer: 747 Q&As

400-101 exam fragen : 400-101 testantworten

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