Cisco 300-165 DCII 問題練習

Question No : 1
Which statement about RADIUS configuration distribution using Cisco Fabric Services on a Cisco Nexus 7000 Series Switch is true?

• A.Cisco Fabric Services does not distribute the RADIUS server group configuration or server and global keys.
• B.Enabling Cisco Fabric Services causes the existing RADIUS configuration on your Cisco NX- OS device to be immediately distributed.
• C.When the RADIUS configuration is being simultaneously changed on more than one device in a Cisco Fabric Services region, the most recent changes will take precedence.
• D.Only the Cisco NX-OS device with the lowest IP address in the Cisco Fabric Services region can lock the RADIUS configuration.

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正解:
Explanation:
CFS does not distribute the RADIUS server group configuration or server and global keys. The keys are unique to the Cisco NX-OS device and are not shared with other Cisco NX-OS devices.
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/6_x/nx-os/security/configuration/guide/b_Cisco_Nexus_7000_NX-OS_Security_Configuration_Guide__Release_6-x/b_Cisco_Nexus_7000_NX­OS_Security_Configuration_Guide__Release_6-x_chapter_0101.html

Question No : 2
By default it will take 10 seconds for authentication to fail due to an unresponsive RADIUS server before a Cisco Nexus series switch reverts to another RADIUS server or local authentication.
What is one efficient way to improve the reaction time to a RADIUS server failure?

• A.Decrease the global RADIUS retransmission count to 1.
• B.Decrease the global RADIUS timeout interval to 5 seconds.
• C.Configure the RADIUS retransmission count and timeout interval per server, versus globally.
• D.Configure per server a test idle timer, along with a username and password.

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正解:
Explanation:
You can monitor the availability of RADIUS servers. These parameters include the username and password to use for the server and an idle timer. The idle timer specifies the interval during which a RADIUS server receives no requests before the Nexus 5000 Series switch sends out a test packet. You can configure this option to test servers periodically. The test idle timer specifies the interval during which a RADIUS server receives no requests before the Nexus 5000 Series switch sends out a test packet. The default idle timer value is 0 minutes. When the idle time interval is 0 minutes, the Nexus 5000 Series switch does not perform periodic RADIUS server monitoring.
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli_rel_4_0_1a/CLIConfigurationGuide/sec_radius.html

Question No : 3
Which two security features are only supported on the Cisco Nexus 7000 Series Switches? (Choose two.)

• A.IP source guard
• B.traffic storm control
• C.CoPP
• D.DHCP snooping
• E.Dynamic ARP Inspection
• F.NAC

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正解:
Explanation:
A traffic storm occurs when packets flood the LAN, creating excessive traffic and degrading network performance. You can use the traffic storm control feature to prevent disruptions on Layer 2 ports by a broadcast, multicast, or unicast traffic storm on physical interfaces. Traffic storm control (also called traffic suppression) allows you to monitor the levels of the incoming broadcast, multicast, and unicast traffic over a 10-millisecond interval. During this interval, the traffic level, which is a percentage of the total available bandwidth of the port, is compared with the traffic storm control level that you configured. When the ingress traffic reaches the traffic storm control level that is configured on the port, traffic storm control drops the traffic until the interval ends.
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/dcnm/security/configuration/guide/b_Cisco_DCNM_Security_Configuration_Guide__Release_5-x/Cisco_DCNM_Security_Configuration_Guide__Release_5-x_chapter17.html http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/dcnm/security/configuration/guide/b_Cisco_DCNM_Security_Configuration_Guide__Release_5-x/Cisco_DCNM_Security_Configuration_Guide__Release_5-x_chapter1.html

Question No : 4
Which statement about implementation of Cisco TrustSec on Cisco Nexus 5546 or 5548 switches are true?

• A.Cisco TrustSec support varies depending on Cisco Nexus 5500 Series Switch model.
• B.The hardware is not able to support MACsec switch-port-level encryption based on IEEE 802.1A
• C.The maximum number of RBACL TCAM user configurable entries is 128k.
• D.The SGT Exchange Protocol must use the management (mgmt 0) interface.

答えを確認する

正解:
Explanation:
https://scadahacker.com/library/Documents/Manuals/Cisco%20-%20TrustSec%20Solution% 20Overview.pdf

Question No : 5
Which statement about the implementation of Cisco TrustSec on Cisco Nexus 7000 Series Switches is true?

• A.While SGACL enforcement and SGT propagation are supported on the M and F modules, 802.1AE (MACsec) support is available only on the M module.
• B.SGT Exchange Protocol is required to propagate the SGTs across F modules that lack hardware support for Cisco TrustSec.
• C.AAA authentication and authorization is supported using TACACS or RADIUS to a Cisco Secure Access Control Server.
• D.Both Cisco TrustSec and 802.1X can be configured on an F or M module interface.

答えを確認する

正解:
Explanation:
The M -Series modules on the Nexus 7000 support 802.1AE MACSEC on all ports, including the new M2­series modules. The F2e modules will have this feature enabled in the future. It is important to note that because 802.1AE MACSEC is a link-level encryption, the two MACSEC-enabled endpoints, Nexus 7000 devices in our case, must be directly L2 adjacent. This means we direct fiber connection or one facilitated with optical gear is required. MACSEC has integrity checks for the frames and intermediate devices, like another switch, even at L2, will cause the integrity checks to fail. In most cases, this means metro-Ethernet services or carrier-provided label switched services will not work for a MACSEC connection.
http://www.ciscopress.com/articles/article.asp?p=2065720

Question No : 6
Which option is a restriction of the unified ports on the Cisco UCS 6200 Series Fabric Interconnect when connecting to the unified fabric network?

• A.Direct FC connections are not supported to Cisco MDS switches
• B.The FCoE or Fibre Channel port allocations must be contiguous on the 6200.
• C.10-G Fibre Channel ports only use SFP+ interfaces.
• D.vPC is not supported on the Ethernet ports.

答えを確認する

正解:
Explanation:
When you configure the links between the Cisco UCS 2200 Series FEX and a Cisco UCS 6200 series fabric interconnect in fabric port channel mode, the available VIF namespace on the adapter varies depending on where the FEX uplinks are connected to the fabric interconnect ports.
Inside the 6248 fabric interconnect there are six sets of eight contiguous ports, with each set of ports managed by a single chip. When uplinks are connected such that all of the uplinks from a Cisco 642-997 Exam FEX are connected to a set of ports managed by a single chip, Cisco UCS Manager maximizes the number of VIFs used in service profiles deployed on the blades in the chassis. If uplink connections from an IOM are distributed across ports managed by separate chips, the VIF count is decreased.
http://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/hw/6200-install­guide/6200_HIG/6200_HIG_chapter_01.html

Question No : 7
Which statement explains why a Cisco UCS 6200 Fabric Interconnect that is configured in end- host mode is beneficial to the unified fabric network?

• A.There is support for multiple (power of 2) uplinks.
• B.Upstream Layer 2 disjoint networks will remain separated.
• C.The 6200 can connect directly via vPC to a Layer 3 aggregation device.
• D.STP is not required on the uplink ports from the 6200.

答えを確認する

正解:
Explanation:
In Cisco Unified Computing System environments, two Ethernet switching modes determine the way that the fabric interconnects behave as switching devices between the servers and the network. In end-host mode, the fabric interconnects appear to the upstream devices as end hosts with multiple links. In end-host mode, the switch does not run Spanning Tree Protocol and avoids loops by following a set of rules for traffic forwarding. In switch mode, the switch runs Spanning Tree Protocol to avoid loops, and broadcast and multicast packets are handled in the traditional way.
http://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/unified-computing/whitepaper_c11-701962.html

Question No : 8
Which statement about the Layer 3 card on the Cisco Nexus 5500 Series Switch is true?

• A.BGP support is not provided, but RIP, EIGRP, and OSPF support is provided.
• B.Up to two 4-port cards are supported with up to 160 Gb/s of Layer 3 forwarding capability.
• C.Up to 16 FEX connections are supported.
• D.Port channels cannot be configured as Layer 3 interfaces.

答えを確認する

正解:
Explanation:
From the Cisco NX-OS 5.1(3)N1(1) release and later releases, each Cisco Nexus 5500 Series device can manage and support up to 24 FEXs without Layer 3. With Layer 3, the number of FEXs supported per Cisco Nexus 5500 Series device is 8. With Enhanced vPC and a dual-homed FEX topology each FEX is managed by both Cisco Nexus 5000 Series devices. As a result, one pair of Cisco Nexus 5500 Series devices can support up to 24 FEXs and 16 FEXs for Layer 2 and Layer 3.
http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/mkt_ops_guides/513_n1_1/n5k_enhanced_vpc.html

Question No : 9
Which two statements about Cisco Nexus 7000 line cards are true? (Choose two.)

• A.M1, M2, and F1 cards are allowed in the same VD
• B.M line cards are service-oriented and likely face the access layer and provide Layer 2 connectivity.
• C.F line cards are performance-oriented and likely connect northbound to the core layer for Layer 3 connectivity.
• D.M line cards support Layer 2, Layer 3, and Layer 4 with large forwarding tables and a rich feature set.
• E.The F2 line card must reside in the admin VD

答えを確認する

正解:
Explanation:
Cisco is introducing a new line card called as F3 Module which has rich feature set and offers high performance 40G/100G port density to the Nexus 7000 product family. Cisco also introduced a new feature in NX-OS 6.2(2) where the F2e line card can be in the same VDC as M1 or M2 Line Card. The objective of this session is to cover detailed steps and methodology of migrating Nexus 7000 with VDC types prior to NX-OS 6.2 to the newer F3 or M/F2e VDC types. The session also covers the effect of VDC migration with commonly used Network features, firewall and load balancer services.
M-Series XL modules support larger forwarding tables. M-Series modules are frequently required at network core, peering, and aggregation points. When used with the F1-Series, the M-Series modules provide inter-VLAN services and form a pool of Layer 3 resources for the system.
Reference:
http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/VMDC/2-6/vmdctechwp.html

Question No : 10
Which statement about scalability in Cisco OTV is true?

• A.The control plane avoids flooding by exchanging MAC reachability.
• B.IP-based functionality provides Layer 3 extension over any transport.
• C.Any encapsulation overhead is avoided by using IS-I
• D.Unknown unicasts are handled by the authoritative edge device.

答えを確認する

正解:
Explanation:
Cisco calls the underlying concept of OTV traffic forwarding "MAC routing", since it behaves as if you are routing Ethernet frames over the DCI transport. OTV uses a control plane protocol to proactively propagate MAC address reachability before traffic is allowed to pass, which eliminates dependency on flooding mechanism to either learn MAC addresses or forward unknown unicasts.
http://www.computerworld.com/article/2515468/data-center/layer-2-data-center-interconnect-options.html

Question No : 11
Which statement about Cisco FabricPath is true?

• A.It is the best solution for interconnecting multiple data centers.
• B.It optimizes STP throughout the Layer 2 network.
• C.It is a simplified extension of Layer 3 networks across a single data center.
• D.The Cisco FabricPath domain appears as a single STP bridge, where each edge port uses the same MAC address.

答えを確認する

正解:
Explanation:
To have a loop-free topology for the CE/FabricPath hybrid network, the FabricPath network automatically displays as a single bridge to all connected CE devices. The STP domains do not cross into the FabricPath network. If multiple STP domains are defined, BPDUs and topology change notifications (TCNs) are localized to the domain. If a connected STP domain is multihomed to the FabricPath domain, a TCN must be able to reach to all devices in the STP domain through the FabricPath domain. As a result, the TCN is sent to the FabricPath domain through the IS-IS protocol data unit (PDU) by default.
http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/mkt_ops_guides/513_n1_1/n5k_ops_fabricpath.html

Question No : 12
Which command allows a Cisco Nexus 7000 Series Switch to receive NTP configuration updates by using Cisco Fabric Services?

• A.N7k (config)# feature ntp
• B.N7k (config)# ntp distribute
• C.N7k (config)# distribute
• D.N7k (config)# ntp master

答えを確認する

正解:
Explanation:



Reference: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/4_2/nx-os/system_management/configuration/guide/sm_nx_os_cli/sm_3ntp.html

Question No : 13
Refer to the exhibit.



What is the result of the configuration (Choose two)?

• A.A MAC address of 11c0.adaa.3213 is denied.
• B.The MAC ACL is applied to VLANs 10-120.
• C.The MAC ACL denies a MAC address of 1122.2847.4591 on VLAN 101.
• D.A MAC address of 11c0.adaa.3213 is permitted.

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正解:

Question No : 14
Refer to the exhibit.
SW3#rollback running-config checkpoint
user-checkpoint-1 atomic
What is the result?

• A.The switch implements a rollback file that is named running-config.
• B.The switch implements a rollback and skips any errors.
• C.The switch implements a rollback that stops if an error occurs.
• D.The switch implements a rollback only if no errors occur.

答えを確認する

正解:
Explanation:
When you roll back the running configuration, you can trigger an atomic rollback. An atomic rollback implements a rollback only if no errors occur.
Reference: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/system_management/503_n1_1/cisco_n5k_system_mgmt_cg_rel_503_n1_1_chapter11.pdf

Question No : 15
Refer to the exhibit.
Information applicable to all KID instances:
Router-lisp ID: 1
Locatot table: vrf DataCenter
Ingress Tunnel Router (ITR): disabled
Eggress Tunnel Router (ETR): disabled
Proxy-ITR Router (PITR): enabled RLOCs: 192.168.1.200
Proxy-ETR Router (PETR): enabled
MAP Server (MS): disabled
MAP Resolver (MR): disabled
Delegated Database Tree (DDT) disabled
ITR Map-Resolver(s): 192.168.1.201
ITR Solicit Map Request (SMR): accept and processes
Max SMRs per map-cache entry: 8 more specifies
Multiple SMR supression time: 20 secs
ETR accept mapping data: disabled, verify disabled
ETR map-cache TTL: 1d00h
Locator Status Algorithms:
RLOC-probe algorithm: disabled
LSB reports: processes
Map-cache limit: 1000
Map-cache activity check period: 60 secs
Persistent map-cache: disabled
Which description of the output is true?

• A.The table output applies to the default VR
• B.The default map-cache limit is used.
• C.PETR is disabled.
• D.The switch acts as an IPv4 LISP ET

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正解: