お手軽にダウンロードできる200-101試験問題集が更新されたのは60問があります
最新更新されたのは200-101試験問題2022年更新
質問 22
A brand plans to run a one-month multi-cell Conversion Lift test on Facebook. The cells are designed to help the brand understand experimentally whether its current creative strategy works for different business goals. The different targets are as follows:
* Prospective audience
* Retargeting audience
What should the analyst recommend pursuing after the test?
- A. Continue with the creative strategy for all cells with positive conversion lift
- B. Continue with the creative strategy for the cell with the highest positive statistically significant conversion lift
- C. Continue with the creative strategy for all cells with positive statistically significant conversion lift
- D. Continue with the creative strategy for the cell with the highest positive conversion lift
正解: C
質問 23
Which three statements about RSTP are true? (Choose three.)
- A. RSTP expands the STP port roles by adding the alternate and backup roles.
- B. RSTP also uses the STP proposal-agreement sequence.
- C. RSTP port states are blocking, discarding, learning, or forwarding.
- D. RSTP provides a faster transition to the forwarding state on point-to-point links than STP does.
- E. RSTP significantly reduces topology reconverging time after a link failure.
- F. RSTP uses the same timer-based process as STP on point-to-point links.
正解: A,D,E
解説:
http://www.cisco.com/en/US/tech/tk389/tk621/technologies_white_paper09186a0080094cfa.shtml
Convergence Cisco enhanced the original 802.1D specification with features such as Uplink Fast, Backbone Fast, and Port Fast to speed up the convergence time of a bridged network. The drawback is that these mechanisms are proprietary and need additional configuration.
Alternate and Backup Port Roles These two port roles correspond to the blocking state of 802.1D. A blocked port is defined as not being the designated or root port. A blocked port receives a more useful BPDU than the one it sends out on its segment.
Remember that a port absolutely needs to receive BPDUs in order to stay blocked. RSTP introduces these two roles for this purpose. Rapid Transition to Forwarding State Rapid transition is the most important feature introduced by 802.1w. The legacy STA passively waited for the network to converge before it turned a port into the forwarding state. The achievement of faster convergence was a matter of tuning the conservative default parameters (forward delay and max_age timers) and often put the stability of the network at stake. The new rapid STP is able to actively confirm that a port can safely transition to the forwarding state without having to rely on any timer configuration. There is now a real feedback mechanism that takes place between RSTP-compliant bridges. In order to achieve fast convergence on a port, the protocol relies upon two new variables: edge ports and link type.
質問 24
Refer to the exhibit.
Each of these four switches has been configured with a hostname, as well as being configured to run RSTP. No other configuration changes have been made. Which three of these show the correct RSTP port roles for the indicated switches and interfaces? (Choose three.)
- A. SwitchA, Fa0/1, root
- B. SwitchB, Gi0/2, root
- C. SwitchC, Fa0/2, root
- D. SwitchD, Gi0/2, root
- E. SwitchA, Fa0/2, designated
- F. SwitchB, Gi0/1, designated
正解: A,D,E
解説:
The question says "no other configuration changes have been made" so we can understand these
switches have the same bridge priority. SwitchC has lowest MAC address so, it will become root
bridge and 2 of its ports (Fa0/1 & Fa0/2) will be designated ports (DP). Because SwitchC is the
root bridge the 2 ports nearest SwitchC on SwitchA (Fa0/1) and SwitchD (Gi0/2) will be root ports
(RP) -> B and F are correct.
SwitchB must have a root port so which port will it choose? To answer this question we need to
know about STP cost and port cost.
In general, "cost" is calculated based on bandwidth of the link. The higher the bandwidth on a link,
the lower the value of its cost. Below are the cost values you should memorize:
Link speed Cost SwitchB will choose the interface with lower cost to the root bridge as the root
port so we must calculate the cost on interface Gi0/1 & Gi0/2 of SwitchB to the root bridge. This
can be calculated from the "cost to the root bridge" of each switch because a switch always advertises its cost to the root bridge in its BPDU. The receiving switch will add its local port cost value to the cost in the BPDU. SwitchC advertises its cost to the root bridge with a value of 0. Switch D adds 4 (the cost value of 1Gbps link) and advertises this value (4) to SwitchB. SwitchB adds another 4 and learns that it can reach SwitchC via Gi0/1 port with a total cost of 8. The same process happens for SwitchA and SwitchB learns that it can reach SwitchC via Gi0/2 with a total cost of 23 -> Switch B chooses Gi0/1 as its root port. Now our last task is to identify the port roles of the ports between SwitchA & SwitchB. It is rather easy as the MAC address of SwitchA is lower than that of SwitchB so Fa0/2 of SwitchA will be designated port while Gi0/2 of SwitchB will be alternative port.
質問 25
Which command is used to display the collection of OSPF link states?
- A. show ip ospf lsa database
- B. show ip ospf database
- C. show ip ospf link-state
- D. show ip ospf neighbors
正解: B
質問 26
Scenario
Refer to the topology. Your company has connected the routers R1. R2. and R3 with serial links.
R2 and R3 are connected to the switches SW1 and SW2, respectively. SW1 and SW2 are also
connected to the routers R4 and R5.
The EIGRP routing protocol is configured.
You are required to troubleshoot and resolve the EIGRP issues between the various routers.
Use the appropriate show commands to troubleshoot the issues.
The loopback interfaces on R4 with the IP addresses of 10.4.4.4 /32, 10.4.4.5/32. and 10.4.4.6/32 are not appearing in the routing table of R5 Why are the interfaces missing?
- A. The loopback addresses haven't been advertised, and the network command is missing on R4.
- B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5.
- C. The interfaces are shutdown, so they are not being advertised.
- D. Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.
正解: B
解説:
For an EIGRP neighbor to form, the following must match:
-Neighbors must be in the same subnet- K values- AS numbers- Authentication method and key strings
Here, we see that R4 is configured for EIGRP AS 2, when it should be AS 1.
質問 27
Which command allows you to verify the encapsulation type (CISCO or IETF) for a Frame Relay link?
- A. show frame-relay lmi
- B. show frame-relay pvc
- C. show frame-relay map
- D. show interfaces serial
正解: C
質問 28
A large news company wants to develop a test that will show up in their marketing-mix model. The goal is to identify the effect of a new media channel during a one-week test conducted across many digital channels as well as TV. They are a national newspaper, so a significant number of conversions come organically on a weekly basis.
The company typically spends $275,000 per week on media, and plans to spend an additional $5,000 on this test, for a total weekly spend of $280,000. The company typically spreads the $275,000 across three digital channels and a mid-sized TV buy.
Which action should be taken to ensure the feasibility of the test showing up in the model?
- A. Increase the overall advertising spend across the target channel
- B. Increase the number of channels being used
- C. Remove TV spending from the campaign
- D. Increase the duration of the test-period
正解: A
質問 29
A network administrator needs to configure a serial link between the main office and a remote location. The router at the remote office is a non-Cisco router. How should the network administrator configure the serial interface of the main office router to make the connection?
- A. Main(config)# interface serial 0/0 Main(config-if)# ip address 172.16.1.1 255.255.255.252 Main(config-if)# encapsulation frame-relay Main(config-if)# authentication chap Main(config-if)# no shut
- B. Main(config)# interface serial 0/0 Main(config-if)# ip address 172.16.1.1 255.255.255.252 Main(config-if)# no shut
- C. Main(config)# interface serial 0/0 Main(config-if)#ip address 172.16.1.1 255.255.255.252 Main(config-if)#encapsulation ietf Main(config-if)# no shut
- D. Main(config)# interface serial 0/0 Main(config-if)# ip address 172.16.1.1 255.255.255.252 Main(config-if)# encapsulation ppp Main(config-if)# no shut
正解: D
解説:
Cisco High-Level Data Link Controller (HDLC) is the Cisco proprietary protocol for sending data over synchronous serial links using HDLC. So HDLC runs only in Cisco router. PPP is not proprietary protocol it's a open source every cisco router and non-cisco router understand the PPP protocol.So we need to configure the PPP protocol if connection is between cisco and non-cisco router.
質問 30
Refer to the exhibit.
How will the router handle a packet destined for 192.0.2.156?
- A. The router will forward the packet via either Serial0 or Serial1.
- B. The router will return the packet to its source.
- C. The router will forward the packet via Serial2.
- D. The router will drop the packet.
正解: C
解説:
Router has pointed default router to 192.168.4.1 and this subnet is connected via serial 2 interface. Router does not have router for the 192.0.2.156. so it will use the default gateway
192.168.4.1. A default route identifies the gateway IP address to which the router sends all IP packets for which it does not have a learned or static route.
質問 31
A large gaming company is developing a measurement strategy designed to shift its planning and buying on Facebook. The company believes that its ability to iterate on testing will provide more long-term growth than the short-term sales boosts from individual campaigns. The conversion rate is high enough that they should have NO issues with statistical power at any size of test/holdout groups. It is planning on running multi-cell Conversion Lift tests on a monthly basis.
What test/holdout proportions should the company use for each test cell?
- A. 60% Test, 40% Holdout
- B. 50% Test, 50% Holdout
- C. 10% Test, 90% Holdout
- D. 90% Test, 10% Holdout
正解: D
質問 32
Which command is used to display the collection of OSPF link states?
- A. show ip ospf lsa database
- B. show ip ospf database
- C. show ip ospf link-state
- D. show ip ospf neighbors
正解: B
解説:
http://www.cisco.com/en/US/docs/ios/iproute_ospf/command/reference/iro_osp3.html#wp101217
Examples The following is sample output from the show ip ospf database command when no arguments or keywords are used: Router# show ip ospf database OSPF Router with id(192.168.239.66) (Process ID 300)
質問 33
An advertiser is reviewing campaign results in Facebook Attribution and determines that optimizing its campaigns for website content views appears to be more successful than optimizing for clicks.
Details reviewed were as follows:
* A last touch attribution model was used
* Look back window was 90 days
* Campaigns optimized for clicks delivered a cost per view for SO.55
* Campaigns optimized for website content views yielded a cost per view of S0.49
The advertiser wants to assess whether or not this difference is meaningful or due to random chance before adjusting its strategy accordingly. What action could the analyst take to determine if the difference is meaningful?
- A. Run data-driven attribution
- B. Run a single-cell Conversion Lift test
- C. Run a single linear regression analysis
- D. Run a multi-cell Conversion Lift test
正解: D
質問 34
When a router undergoes the exchange protocol within OSPF, in what order does it pass through each state?
- A. exstart state > loading state > exchange state > full state
- B. exstart state > exchange state > loading state > full state
- C. exstart state > full state > loading state > exchange state
- D. loading state > exchange state > full state > exstart state
正解: B
解説:
Why Are OSPF Neighbors Stuck in Exstart/Exchange State? Reference:
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f0d.shtml
質問 35
Which two are advantages of static routing when compared to dynamic routing? (Choose two.)
- A. Routing tables adapt automatically to topology changes.
- B. An efficient algorithm is used to build routing tables, using automatic updates.
- C. Security increases because only the network administrator may change the routing table.
- D. Configuration complexity decreases as network size increases.
- E. Route summarization is computed automatically by the router.
- F. Routing updates are automatically sent to neighbors.
- G. Routing traffic load is reduced when used in stub network links.
正解: C,G
解説:
http://www.ciscopress.com/articles/article.asp?p=24090&seqNum=6
http://www.ciscopress.com/articles/article.asp?p=24090
質問 36
Which three statements about HSRP operation are true? (Choose three.)
- A. HSRP supports only clear-text authentication.
- B. HSRP supports up to 255 groups per interface, enabling an administrative form of load balancing.
- C. The HSRP virtual IP address must be on a different subnet than the routers' interfaces on the same LAN.
- D. The HSRP default timers are a 3 second hello interval and a 10 second dead interval.
- E. The virtual IP address and virtual MA+K44C address are active on the HSRP Master router.
- F. The HSRP virtual IP address must be the same as one of the router's interface addresses on the LAN.
正解: B,D,E
質問 37
Refer to the exhibit.
The following commands are executed on interface fa0/1 of 2950Switch.
2950Switch(config-if)# switchport port-security
2950Switch(config-if)# switchport port-security mac-address sticky
2950Switch(config-if)# switchport port-security maximum 1
The Ethernet frame that is shown arrives on interface fa0/1. What two functions will occur when this frame is received by 2950Switch? (Choose two.)
- A. Hosts B and C may forward frames out fa0/1 but frames arriving from other switches will not be forwarded out fa0/1.
- B. All frames arriving on 2950Switch with a destination of 0000.00aa.aaaa will be forwarded out fa0/1.
- C. Only frames from source 0000.00bb.bbbb, the first learned MAC address of 2950Switch, will be forwarded out fa0/1.
- D. The MAC address table will now have an additional entry of fa0/1 FFFF.FFFF.FFFF.
- E. This frame will be discarded when it is received by 2950Switch.
- F. Only host A will be allowed to transmit frames on fa0/1.
正解: B,F
質問 38
Scenario
Refer to the topology. Your company has connected the routers R1. R2. and R3 with serial links.
R2 and R3 are connected to the switches SW1 and SW2, respectively. SW1 and SW2 are also
connected to the routers R4 and R5.
The EIGRP routing protocol is configured.
You are required to troubleshoot and resolve the EIGRP issues between the various routers.
Use the appropriate show commands to troubleshoot the issues.
Study the following output taken on R1:
R1# Ping 10.5.5.55 source 10.1.1.1
Type escape sequence to abort.
Sending 5.100-byte ICMP Echos to 10.5.5.55, timeout is 2 seconds:
Packet sent with a source address of 10.1.1.1
Why are the pings failing?
- A. The loopback interface is shut down on R5.
- B. The network statement is missing on R1.
- C. The IP address that is configured on the Lo1 interface on R5 is incorrect.
- D. The network statement is missing on R5.
正解: B
解説:
R5 does not have a route to the 10.1.1.1 network, which is the loopback0 IP address of R1. When looking at the EIGRP configuration on R1, we see that the 10.1.1.1 network statement is missing on R1.
Topic 6, Mix Questions
質問 39
Which two are advantages of static routing when compared to dynamic routing? (Choose two.)
- A. Routing tables adapt automatically to topology changes.
- B. An efficient algorithm is used to build routing tables, using automatic updates.
- C. Security increases because only the network administrator may change the routing table.
- D. Configuration complexity decreases as network size increases.
- E. Route summarization is computed automatically by the router.
- F. Routing updates are automatically sent to neighbors.
- G. Routing traffic load is reduced when used in stub network links.
正解: C,G
質問 40
Which term describes a spanning-tree network that has all switch ports in either the blocking or fowarding state?
- A. spanned
- B. redundant
- C. converged
- D. provisioned
正解: C
質問 41
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