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試験番号：300-115 全真模擬試験
試験科目：「Implementing Cisco IP Switched Networks (SWITCH)」
最近更新時間：2015-06-01
問題と解答：156

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NO.1 Ferris Plastics, Inc. is a medium sized company, with an enterprise network (access, distribution
and core switches) that provides LAN connectivity from user PCs to corporate servers. The
distribution switches are configured to use HSRP to provide a high availability solution.
DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105
DSW2 - primary device for VLAN 103 and VLAN 104
A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its
status as the primary device, unless GigabitEthernet1/0/1 on backup device has also failed.
Troubleshooting has identified several issues. Currently all interfaces are up. Using the running
configurations and show commands, you have been asked to investigate and respond to the
following question.
During routine maintenance, it became necessary to shut down the GigabitEthernet1/0/1 interface
on DSW1. All other interfaces were up. During this time, DSW1 remained the active device for the
VLAN 102 HSRP group. You have determined that there is an issue with the decrement value in the
track command for the VLAN 102 HSRP group. What needs to be done to make the group function
properly?
A. The decrement value on DSW1 should be greaterthan 5 and less than 15. 0
B. The decrement value on DSW1 should be greaterthan 9 and less than 15.
C. The decrement value on DSW1 should be greaterthan 11 and less than 19.
D. The decrement value on DSWTs should be greaterthan 190 and less than 200.
E. The decrement value on DSWTs should be greaterthan 195 and less than 205.
Answer: C

Cisco解答例 300-115 300-115資格取得 300-115知識 300-115科目対策
Explanation:
http://dc342.4shared.com/doc/UoRbVi9j/preview_html_6e374c86.jpg
Use "show run" command to show. The left Vlan102 is console1 of DS1. Priority value is 200, we
should decrement value in the track command from 11 to 18. Because 200 - 11 = 189 < 190 (priority
of Vlan102 on DS2).

NO.2 Which private VLAN access port belongs to the primary VLAN and can communicate with all
interfaces, including the community and isolated host ports?
A. promiscuous port
B. isolated port
C. community port
D. trunk port
Answer: A

Cisco 300-115 300-115ソフト版
Explanation:
The types of private VLAN ports are as follows:
Promiscuous-A promiscuous port belongs to the primary VLAN. The promiscuous port can
communicate with all interfaces, including the community and isolated host ports, that belong to
those secondary VLANs associated to the promiscuous port and associated with the primary VLAN.
You can have several promiscuous ports in a primary VLAN. Each promiscuous port can have several
secondary VLANs, or no secondary VLANs, associated to that port. You can associate a secondary
VLAN to more than one promiscuous port, as long as the promiscuous port and secondary VLANs are
within the same primary VLAN. You may want to do this for load-balancing or redundancy purposes.
You can also have secondary VLANs that are not associated to any promiscuous port.
Isolated-An isolated port is a host port that belongs to an isolated secondary VLAN. This port has
complete isolation from other ports within the same private VLAN domain, except that it can
communicate with associated promiscuous ports. Private VLANs block all traffic to isolatedports
except traffic from promiscuous ports. Traffic received from an isolated port is forwarded only to
promiscuous ports. You can have more than one isolated port in a specified isolated VLAN. Each port
is completely isolated from all other ports in the isolated VLAN.
Community-A community port is a host port that belongs to a community secondary VLAN.
Community ports communicate with other ports in the same community VLAN and with associated
promiscuous ports. These interfaces are isolated from all other interfaces in other communities and
from all isolated ports within the private VLAN domain.
Reference:http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/config
uration/guide/cli/CLIConfigurationGuide/PrivateVLANs.html

NO.3 Which AAA Authorization type includes PPP, SLIP, and ARAP connections?
A. network
B. IP mobile
C. EXEC
D. auth-proxy
Answer: A

Cisco日本語 300-115赤本 300-115試験時間 300-115
Explanation:
Method lists for authorization define the ways that authorization will be performed and the sequence
in which these methods will be performed.
A method list is simply a named list describing the authorization methods to be queried (such as
RADIUS or TACACS+), in sequence. Method lists enable you to designate one or more security
protocols to be used for authorization, thus ensuring a backup system in case the initial method fails.
Cisco IOS software uses the first method listed to authorize users for specific network services; if that
method fails to respond, the Cisco IOS software selects the next method listed in the method list. This
process continues until there is successful communication with a listed authorization method, or all
methods defined are exhausted. Method lists are specific to the authorization type requested:
Auth-proxy-Applies specific security policies on a per-user basis.
For detailed information on the authentication proxy feature, refer to the chapter "Configuring
Authentication Proxy" in the "Traffic Filtering and Firewalls" part of this book.
Commands-Applies to the EXEC mode commands a user issues. Command authorization attempts
authorization for all EXEC mode commands, including global configuration commands, associated
with a specific privilege level.
EXEC-Applies to the attributes associated with a user EXEC terminal session.
Network-Applies to network connections. This can include a PPP, SLIP, or ARAP connection.
Reverse Access-Applies to reverse Telnet sessions.
When you create a named method list, you are defining a particular list of authorization
methods for the indicated authorization type.
Reference:http://www.cisco.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/s
cfathor.html

NO.4 A network engineer is extending a LAN segment between two geographically separated data
centers. Which enhancement to a spanning-tree design prevents unnecessary traffic from crossing
the extended LAN segment?
A. Modify the spanning-tree priorities to dictate the traffic flow.
B. Create a Layer 3 transit VLAN to segment the traffic between the sites.
C. Use VTP pruning on the trunk interfaces.
D. Configure manual trunk pruning between the two locations.
Answer: C

Cisco問題集 300-115認定資格 300-115学習 300-115番号 300-115認定デベロッパー
Explanation:
Pruning unnecessary VLANs from the trunk can be performed with one of two methods:
Manual pruning of the unnecessary VLAN on the trunk-This is the best method, and it
avoids the use of the spanning tree. Instead, the method runs the pruned VLAN on trunks.
VTP pruning-Avoid this method if the goal is to reduce the number of STP instances.
VTP-pruned VLANs on a trunk are still part of the spanning tree. Therefore, VTP-pruned
VLANs do not reduce the number of spanning tree port instances.
Since the question asked for the choice that is an enhancement to the STP design, VTP
pruning is the best choice.
Reference:
http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613.
shtml

NO.5 A network engineer configures port security and 802.1x on the same interface. Which option
describes what this configuration allows?
A. It allows port security to secure the MAC address that 802.1x authenticates.
B. It allows port security tosecure the IP address that 802.1x authenticates.
C. It allows 802.1x to secure the MAC address that port security authenticates.
D. It allows 802.1x to secure the IP address that port security authenticates.
Answer: A

Cisco過去問題 300-115独学書籍 300-115購入 300-115認定
Explanation:
802.1X and Port Security You can configure port security and 802.1X on the same interfaces. Port
security secures the MAC addresses that 802.1X authenticates. 802.1X processes packets before port
securityprocesses them, so when you enable both on an interface, 802.1X is already preventing
inbound traffic on the interface from unknown MAC addresses.
Reference:http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nxos/security/confi
guration/guide/sec_nx-os-cfg/sec_portsec.html

NO.6 Which gateway role is responsible for answering ARP requests for the virtual IP address in
GLBP?
A. active virtual forwarder
B. active virtual router
C. active virtual gateway
D. designated router
Answer: C

Ciscoバージョン 300-115 300-115 300-115 300-115試験時間
Explanation:
GLBP Active Virtual Gateway
Members of a GLBP group elect one gateway to be the active virtual gateway (AVG) for that group.
Other group members provide backup for the AVG in the event that the AVG becomes unavailable.
The AVG assigns a virtual MAC address to each member of the GLBP group. Each gateway assumes
responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG. These
gateways are known as active virtual forwarders (AVFs) for their virtual MAC address.
The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP
address. Load sharing is achieved by the AVG replying to the ARP requests with different virtual MAC
addresses.
Reference:http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html

NO.7 Refer to the exhibit.
A network engineer wants to analyze all incoming and outgoing packets for an interface that is
connected to an access switch. Which three items must be configured to mirror traffic to a packet
sniffer that is connected to the distribution switch? (Choose three.)
A. A monitor session on the distribution switch with a physical interface as the source and the remote
SPAN VLAN as the destination
B. A remote SPAN VLAN on the distribution and access layer switch
C. A monitor session on the access switch with a physical interface source and the remote SPAN VLAN
as the destination
D. A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical
interface as the destination
E. A monitor session on the access switch with a remote SPAN VLAN source and the physical interface
as the destination
F. A monitor session on the distribution switch with a physical interface as the source and a physical
interface as the destination
Answer: B,C,D

Cisco復習資料 300-115勉強法 300-115 300-115最新版
Explanation:
You can analyze network traffic passing through ports or VLANs by using SPAN or RSPAN to send a
copy of the traffic to another port on the switch or on another switch that has been connected to a
network analyzer or other monitoring or security device. SPAN copies (or mirrors) traffic received or
sent (or both) on source ports or source VLANs to a destination port for analysis. RSPAN supports
source ports, source VLANs, and destination ports on different switches (or different switch stacks),
enabling remote monitoring of multiple switches across your network. The traffic for each RSPAN
session is carried over a user-specified RSPAN VLAN that is dedicated for that RSPAN session in all
participating switches. The RSPAN traffic from thesource ports or VLANs is copied into the RSPAN
VLAN and forwarded over trunk ports carrying the RSPAN VLAN to a destination session monitoring
the RSPAN VLAN. Each RSPAN source switch must have either ports or VLANs as RSPAN sources. The
destination is always a physical port
Reference:http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/softwar
e/release/12-2_55_se/configuration/guide/3750xscg/swspan.html

NO.8 Which VTP mode is needed to configure an extended VLAN, when a switch is configured to use
VTP versions 1 or 2?
A. transparent
B. client
C. server
D. Extended VLANs are only supported in version 3 and not in versions 1 or 2.
Answer: D

Cisco過去問 300-115ソートキー 300-115 PDF 300-115必要性
Explanation:
VTP version 1 and version 2 support VLANs 1 to 1000 only. Extended-range VLANs are supported only
in VTP version 3.
If converting from VTP version 3 to VTP version 2, VLANs in the range 1006 to 4094 are removed from
VTP control.
Reference:
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide
/vtp.html

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