ずっと自分自身を向上させたいあなたは、400-101認定試験を受験する予定があるのですか。もし受験したいなら、試験の準備をどのようにするつもりですか。もしかして、自分に相応しい試験参考書を見つけたのでしょうか。では、どんな参考書は選べる価値を持っていますか。あなたが選んだのは、Pass4Testの400-101問題集ですか。もしそうだったら、もう試験に合格できないなどのことを心配する必要がないのです。
Pass4TestのCiscoの400-101試験トレーニング資料は豊富な経験を持っているIT専門家が研究したもので、問題と解答が緊密に結んでいるものです。Ciscoの400-101試験トレーニング資料は現在、市場上で一番質のいい学習教材です。Pass4Testは無料でサンプルを提供することができる。うちの学習教材は君の認定試験に合格することに大変役に立ちます。
試験番号：400-101試験科目：「CCIE Routing and Switching Written Exam v5.0」
一年間無料で問題集をアップデートするサービスを提供いたします
最近更新時間：2015-08-06
問題と解答：全747問 400-101 試験内容
競争がますます激しいIT業種では、Ciscoの400-101試験の認定は欠くことができない認証です。Pass4Testを選んだら、君が一回でCiscoの400-101認定試験に合格するのを保証します。もしPass4TestのCiscoの400-101試験トレーニング資料を購入した後、学習教材は問題があれば、或いは試験に不合格になる場合は、私たちが全額返金することを保証いたします。
NO.1 Which two options are EIGRP route authentication encryption modes? (Choose two.)
A. MD5
B. HMAC-SHA-256bit
C. ESP-AES
D. HMAC-AES
Answer: A,B
Cisco資格認定 400-101信頼度 400-101市販本 400-101認定テキスト 400-101試験対策
Explanation:
Packets exchanged between neighbors must be authenticated to ensure that a device accepts
packets only from devices that have the same preshared authentication key. Enhanced Interior
Gateway Routing Protocol (EIGRP) authentication is configurable on a per-interface basis; this means
that packets exchanged between neighbors connected through an interface are authenticated. EIGRP
supports message digest algorithm 5 (MD5) authentication to prevent the introduction of
unauthorized information from unapproved sources. MD5 authentication is defined in RFC 1321.
EIGRP also supports the Hashed Message Authentication Code-Secure Hash Algorithm-256 (HMAC-
SHA-256) authentication method.
Reference. http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/xe-
3s/irexe-3s-book/ire-sha-256.html
NO.2 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認定資格 400-101予想試験 400-101パッケージ 400-101試験内容
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.3 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プログラム 400-101模擬試験 400-101模擬練習 400-101通信
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.4 Refer to the exhibit.
Which OSPFv3 routes will be visible in the routing table of R2?
A. 2001:12::1/128
B. 2001:12::1/128, 2001:112::1/128
C. 2001:12::2/128
D. No OSPFv3 routes will be visible.
Answer: D
Cisco受験 400-101特典 400-101復習資料 400-101 400-101組織 400-101方法
Explanation:
The command "ipv6 unicast-routing" needs to be configured on both routers before any IPv6 routes
will be seen.
NO.5 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再テスト 400-101段階 400-101試験スクール
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.6 What is the cause of ignores and overruns on an interface, when the overall traffic rate of the
interface is low?
A. a hardware failure of the interface
B. a software bug
C. a bad cable
D. microbursts of traffic
Answer: D
Ciscoクラムメディア 400-101関節 400-101専門知識 400-101評判 400-101学習
Explanation:
Micro-bursting is a phenomenon where rapid bursts of data packets are sent in quick succession,
leading to periods of full line-rate transmission that can overflow packet buffers of the network stack,
both in network endpoints and routers and switches inside the network. Symptoms of micro bursts
will manifest in the form of ignores and/ or overruns (also shown as accumulated in "input error"
counter within show interface output). This is indicative of receive ring and corresponding packet
buffer being overwhelmed due to data bursts coming in over extremely short period of time
(microseconds). You will never see a sustained data traffic within show interface's "input rate"
counter as they are averaging bits per second (bps) over 5 minutes by default (way too long to
account for microbursts). You can understand microbursts from a scenario where a 3-lane highway
merging into a single lane at rush hour - the capacity burst cannot exceed the total available
bandwidth (i.e. single lane), but it can saturate it for a period of time.
Reference. http://ccieordie.com/?tag=micro-burst
NO.7 What is the goal of Unicast Reverse Path Forwarding?
A. to verify the reachability of the destination address in forwarded packets
B. to help control network congestion
C. to verify the reachability of the destination address in multicast packets
D. to verify the reachability of the source address in forwarded packets
Answer: D
Cisco 400-101スクール 400-101
Explanation:
Network administrators can use Unicast Reverse Path Forwarding (Unicast RPF) to help limit the
malicious traffic on an enterprise network. This security feature works by enabling a router to verify
the reachability of the source address in packets being forwarded. This capability can limit the
appearance of spoofed addresses on a network. If the source IP address is not valid, the packet is
discarded.
Reference. http://www.cisco.com/web/about/security/intelligence/unicast-rpf.html
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
試験番号 Cisco 400-101科目 400-101トレーニング資料 400-101正確率
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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