Which three factors does Cisco PfR use to calculate the best exit path? (Choose three.)
A.
quality of service
B.
packet size
C.
delay
D.
loss
E.
reachability
F.
administrative distance
Which three factors does Cisco PfR use to calculate the best exit path?
Which three factors does Cisco PfR use to calculate the best exit path? (Choose three.)
CDE
http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/performance-routing-pfr/product_data_sheet0900aecd806c4ee4.html
Passive monitoring metrics include the following:
• Delay: Cisco PfR measures the average delay of TCP flows for a given prefix or traffic class. Delay is the measurement of the round-trip response time (RTT) between the transmission of a TCP synchronization message and receipt of the TCP acknowledgement.
• Packet loss: Cisco PfR measures packet loss by tracking TCP sequence numbers for each TCP flow; it tracks the highest TCP sequence number. If it receives a subsequent packet with a lower sequence number, PfR increments the packet-loss counter. Packet loss is measured in packets per million.
• Reachability: Cisco PfR measures reachability by tracking TCP synchronization messages that have been sent repeatedly without receiving a TCP acknowledgement.
• Throughput: Cisco PfR measures throughput by measuring the total number of bytes and packets for each interesting traffic class or prefix for a given interval of time.
but QoS is also one of the parameters by the mean opinion Score, this is correct answer too
New 400-101 Exam Questions and Answers Updated Recently (16/Jan/2017):
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NEW QUESTION 1
Which statement about Cisco StackWise technology is true?
A. All switches in a stack share configuration and routing information to behave as a single unit
B. Removing switches can affect stack performance
C. Only the master switch acts as a forwarding processor
D. Every switch in a stack has its own independent … configuration file, which enables it to become the stack master if the previous master fails
Answer: A
Explanation:
Configuration and routing information is shared by every switch in the stack, creating a single switching unit.
cisco.com/c/en/us/products/collateral/switches/catalyst-3750-series-switches/prod_white_paper09186a00801b096a.html
NEW QUESTION 2
Which feature can mitigate hung management sessions?
A. Control Plane Policing
B. the service tcp-keepalives-in and service tcp-keepalives-out command
C. the service tcp-small servers command
D. vty line ACLs
Answer: B
NEW QUESTION 3
Which option is an example of SaaS?
A. Google Apps
B. Amazon AWS
C. Google App Engine
D. Microsoft Azure
Answer: A
NEW QUESTION 4
How does an IPv6 host automatically generate a global address?
A. It prepends its interface identifier to the network prefixes contained in Router Advertisement messages.
B. It appends its interface identifier to the network prefixes contained in Router Advertisement messages.
C. It appends its interface identifier to the network prefixes contained in Router Solicitation messages.
D. It prepends its interface identifier to the network prefixes contained in Router Solicitation messages.
Answer: B
NEW QUESTION 5
Which two commands should you enter to enable IP Source Guard with IP and MAC address filtering? (Choose two.)
A. ip verify source tracking
B. switchport port-security
C. ip verify unicast source
D. ip verify source
E. ip verify source port-security
Answer: AE
NEW QUESTION 6
Which option describes a difference between Ansible and Puppet?
A. Ansible is client-server based, and Puppet is not.
B. Ansible requires an agent, and Puppet does not.
C. Ansible is Python based, and Puppet is Ruby based.
D. Ansible autonates repetitive tasks, and Puppet allows you to run plain ssh command.
Answer: C
NEW QUESTION 7
What is the default behavior for a manual summary route when a component route of the summary disappears?
A. Regardless of the metric if the componnent route, the metric of the summary is unchanged in order to keep stability.
B. If the component route previously had the best composite metric, the same summary metric is retained for stability.
C. If the component route previously had the best composite metric, the metric of the summary changes to the next-best composite metric.
D. if the component route previously did not have the best composite metric, the summary metric is updated, and updates are sent to peers.
Answer: C
NEW QUESTION 8
What are the two variants of NTPv4? (Choose two.)
A. client/server
B. broadcast
C. multicast
D. asymmetric
E. unicast
Answer: AB
NEW QUESTION 9
For what reason might you choose to use an SVTI interface instead of a crypto map on a tunnel interface?
A. SVTIs support dynamic routing protocols without GRE headers.
B. SVTIs can support multiple IPSec SAs.
C. SVTIs can carry non-IP traffic.
D. SVTIs support CEF-switched traffic shaping.
Answer: A
NEW QUESTION 10
Refer to the exhibit. Which two statements about the output are true? (Choose two.)
Image URL: examgod.com/plimages/3e263efdddcf_ECEC/passleader-400-101-dumps-101.jpg
A. BFD last failed 476ms ago on interface GigabitEthernet 0/3.
B. BGP on RT1 has negotiated the BFD capability with its peer.
C. BFD is active on interface GigabitEthernet0/3 and is using ICMP.
D. BFD is active on interface GigabitEthernet0/3 and is using UDP.
E. BFD is active for BGP on RT1.
Answer: BE
NEW QUESTION 11
Which two statements about PPP PAP are true? (Choose two.)
A. It requires two-way authentication.
B. It can protect against playback attacks.
C. It is supported only on synchronous interfaces.
D. It is vulnerable to trial-and error attacks.
E. Login attempts are controlled by the remote node.
Answer: DE
NEW QUESTION 12
Refer to the exhibit. What is the PHB class on this flow?
Image URL: examgod.com/plimages/3e263efdddcf_ECEC/passleader-400-101-dumps-121.jpg
A. none
B. CS4
C. EF
D. AF21
Answer: B
NEW QUESTION 13
……
NEW QUESTION 20
Drag and Drop Question
Drag each NTP command on the left to its effect on the right.
Image URL: examgod.com/plimages/3e263efdddcf_ECEC/passleader-400-101-dumps-201.jpg
Answer:
Image URL: examgod.com/plimages/3e263efdddcf_ECEC/passleader-400-101-dumps-202.jpg
NEW QUESTION 21
……
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New 400-101 Exam Questions Updated Recently (9/May/2017):
NEW QUESTION 279
Which option describes the characteristics of a public Infrastructure as a Service cloud service model?
A. It is a way of delivering cloud-computing infratructure (servers, storage, network, and operating systems) as an on-demand service
B. It is a cloud service where the underlying hardware is managed by the cloud service provider
C. It is a cloud-computing platform that facilitaes the creation of web applications without the need to maintain the supporting software application
D. It is a cloud-computing platform that facilitaes the creation of web applications without the need to maintain the supporting software operating systems
Answer: A
NEW QUESTION 280
Which option is can example of SaaS?
A. Google Apps
B. Amazon AWs
C. Google App Engine
D. Microsoft Azure
Answer: A
NEW QUESTION 281
Which two statements about static routing are ture? (Choose two.)
A. It is highly scalable as networks grow
B. It reduces configuration errors
C. It can be implemented more quickly that dynamic routing
D. It provides better security than dynamic routing
E. It requires less bandwidth and fewer CPU cycles than dynamic routing protocols
Answer: DE
NEW QUESTION 282
Which value does VPLS use to make forwarding decisions?
A. destination IP address of the packet
B. destination MAC of the Ethernet frame
C. source IP address of the packet
D. source MAC of the Ethernet frame
Answer: B
NEW QUESTION 283
Which three configuration settings must match for switches to be in the same MST region? (Choose three.)
A. password
B. region name
C. VLAN-to-instance assignment
D. revision number
E. VLAN names
F. domain name
Answer: BCD
NEW QUESTION 284
……
NEW QUESTION 285
Which two statements about IPv6 multicast address are true? (Choose two.)
A. An IPv6 host must join the solicited-node multicast group for every unicast and anycast address on the node
B. IPv6 routers update their routing tables when they receive a redirect message on a segment
C. Solicited-node multicast addresses are based on the lower-order 24 bits of the unicast or anycast address
D. They perform neighbor unreachability detection only for neighbors that send multicast packets
E. Neighbors respone to solicitation messages by sending Router Advertisement message
F. They use UDP packets to perform neighbor unreachability detection
Answer: AC
NEW QUESTION 286
Which type of access list allows granular session filtering for upper-level protocols?
A. reflexive access lists
B. context-based access lists
C. content-based access lists
D. extended access lists
Answer: A
NEW QUESTION 287
In which scenario can asymmetric routing occur?
A. redundant routers running VRRP
B. active/standby firewall setup
C. active/active firewall setup
D. single path in and out of the network
Answer: C
NEW QUESTION 288
……
NEW QUESTION 289
Which three of the following secrity controls would you take into consideration when implementing IoT capabilities? (Choose three.)
A. Layered Security Approach
B. Place security above functionality
C. Define lifecycle controls for IoT devices
D. Privacy Impact Assessment
E. Change passwords every 90 days
F. Implement Intrusion Detection Systems on IoT devices
Answer: ACD
NEW QUESTION 290
A network engineer enables OSPF on a Frame Relay WAN connection to various remote sites,but no OSPF adjacencies come up.Which two actions are possible solutions for this issue? (Choose two.)
A. Change the network type to nonbroadcast multipoint access
B. Configure the neighbor command under OSPF process for each remote site
C. Ensure that the OSPF process number matches among all remote sites
D. Enable virtual links
E. Change the network type to point-to-multipoint under WAN interface
Answer: BE
NEW QUESTION 291
……
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New 400-101 Exam Questions and Answers Updated Recently (6/June/2017):
NEW QUESTION 329
Two routers are connected on a PPP link using CHAP authentication by default which value will the routers use as their identification on the link?
A. Their hostnames
B. Their IP address on the connected link
C. Their interface numbers
D. Their serial numbers
Answer: A
NEW QUESTION 330
Which component of a GETVPN deployment is responsible for obtaining an IPsec SA to encrypt data within a group?
A. Group member
B. Key Server
C. GDOI
D. GRE
Answer: C
NEW QUESTION 331
Which PIM multicast type is designed to be used for many-to-many applications within individual PIM domains?
A. PIM-DM
B. Bidir-PIM
C. PIM-SM
D. SSM
Answer: B
NEW QUESTION 332
……
NEW QUESTION 334
Which tunneling method can transmit IPv6 traffic over an MPLS infrastructure?
A. 6PE
B. 6to4
C. ISATAP
D. 6RD
Answer: A
NEW QUESTION 335
Which IPv6 solution provides network information to clients without providing an IPv6 host address?
A. autoconfiguration
B. stateless DHCPv6
C. stateful DHCPv6
D. prefix delegation
Answer: A
NEW QUESTION 336
Which two statements about PPP CHAP authentication are true? (Choose two.)
A. It is a one-way authentication method
B. It uses a secret password, which is sent across the link for authentication
C. It supports clear-text passwords
D. It is configurable only on PPP callout links
E. It uses a configured username and password to authenticate a host
Answer: AE
NEW QUESTION 337
……
NEW QUESTION 339
After you configure split horizon on an EIGRP hub-and-spoke network. You notice that some routes are missing on the spoke routers. Which two actions can you take to correct the problem? (Choose two.)
A. Increase the Hello and Hold timers on the connections between the routers
B. Configure unicast neighbor statements on both the hub and the spokes
C. Disable split horizon on the spoke router interfaces only
D. Disable split horizon on the hub router interface only
E. Configure the summary address command on the hub router
F. Define a separate subinterface on the hub router for each spoke
Answer: DF
NEW QUESTION 340
Which technology must be enabled on an interface before L2TPv3 can operate correctly?
A. OSPF
B. MPLS
C. CEF
D. STP
Answer: C
NEW QUESTION 341
……
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New 400-101 Exam Questions and Answers Updated Recently (28/June/2017):
NEW QUESTION 610
Which two statements about MLD snooping are true?
A. MLD protocol messages can be sent in both IGMPv4 and ICMPv4 formats.
B. It supports private VLANs.
C. It limits the Layer 2 multicast traffic that is generate by routing protocols.
D. PFC modes support MLD version 2 only.
E. The MLD snooping querier requires the VLAN interface to be configured with an IPv6 address.
Answer: BE
NEW QUESTION 611
Which IPv6 tunneling mechanism requires a service provider to nude one of its own native IPv6 blocks to guarantee that its IPv6 hosts will be reachable?
A. 6rd tunneling
B. Automatic 6to4 tunneling
C. Manual IPv6 ip tunneling
D. NAT-PT tunneling
E. Automatic 4to6 tunneling
F. ISATAP tunneling
Answer: F
NEW QUESTION 612
Refer to the exhibit. After you applied this configuration to R1 and R2, they failed to form an ISIS adjacency. Which reason for the problem is most likely true?
……
A. The network statements are mismatched
B. The IP subnets are mismatched
C. T he bandwidth is mismatched
D. The MTUs are mismatched
Answer: D
NEW QUESTION 613
Which two statements about cisco Express Forwarding are ture? (Choose two.)
A. Adjacency tables and Cisco Express Forwarding tables require packet switching.
B. Cisco Express Forwarding tables contain forwarding information on and adjacency tables contain reachability information.
C. Adjacency tables and Cisco Express forwarding tables can be separately.
D. Changing MAC header rewrite strings requires cache validation.
E. Cisco Express Forwarding tables contain reach ability information and adjacency tables contain forwarding information.
Answer: CE
NEW QUESTION 614
On which three options can Cisco PfR base its traffic routing? (Choose three.)
A. Time of day
B. Network performance
C. Router lOS version
D. User-defined link capacity thresholds
E. An access list with permit or deny statements
F. Load-balancing requirements
Answer: BDF
NEW QUESTION 615
Which three statements about BGP soft reconfiguration are true? (Choose three)
A. Outbound soft reconfiguration requires additional configuration on the BGP neighbor
B. Inbound soft reconfiguration requires additional memory
C. Outbound soft reconfiguration requires additional memory
D. Inbound soft reconfiguration stores an additional copy of the received from a neighbor before routing policies take effect
E. Inbound soft reconfiguration requires additional memory
F. Outbound soft reconfiguration stores an additional copy of the routes advertised to a neighbor before routing policies take effect
Answer: BEF
NEW QUESTION 616
What mechanism should you choose to prevent unicast flooding?
A. Make sure that all end systems are connected to the network with a single physical connection.
B. Use control plane policing (CPP) to limit unicast flooding.
C. Configure the ARP cache timers to be longer than the switch forwarding cache (CAM) timers.
D. Configure the switch forwarding cache (CAM) timers to be longer than the ARP cache timers.
Answer: D
NEW QUESTION 617
Refer to the exhibit. Which two statements about the device configuration are true? (Choose two.)
……
A. The device has control-plane protection enabled.
B. The device implicitly allows Tel net connections.
C. The GigabitEthernet0/1 interface of the device allows incoming SSH and SNMP connections.
D. The device has management-plane protection enabled.
E. The device allows SSH connections to its loopback interface.
Answer: CD
NEW QUESTION 618
What are the two requirements for BGP to install a classful network into the BGP routing table? (Choose two.)
A. Synchronization is disabled.
B. The AS contains the entire classful network.
C. Auto-summary is enabled.
D. A classful network is statement with a classful mask is in the routing table.
E. A classful network statement with a lower administrative distance in the routing table.
F. Synchronization is enabled.
Answer: CD
NEW QUESTION 619
Which authentication types does OSPF support?
A. Null (or no authentication), clear text and MD5.
B. Clear text only.
C. MD5 only.
D. MD5 and clear text.
E. Null (or no authentication) and clear text.
Answer: A
NEW QUESTION 620
……
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New 400-101 Exam Questions and Answers (2/Aug/2017 Updated):
NEW QUESTION 710
Which information is contained in an OSPF Type 7 Not-So-Stubby Area NSSA External LSA?
A. External network address, mask, and cost to reach network that is external to the OSPF domain and only within the NSSA.
B. The external network address, mask and cost to reach networks that are external to the OSPF NSSA, including the default route.
C. The address of routers that connect the current area to other areas and cost to reach those routers.
D. The paths and costs to reach other stub area border routers in the OSPF routing domain.
E. The paths and costs to all OSPF NSSA areas that are external to the current area.
Answer: A
NEW QUESTION 711
Refer to the exhibit. The Main1 and Branch1 switches are connected directly over an MPLS pseudowire, and both run UDLD. After router B1 reloads because of a power failure, the pseudowire is restored. However, the Branch 1 switch is unable to reach the Main 1 switch. Which two actions can you take to restore connectivity and prevent the problem from recurring? (Choose two.)
……
A. Issue the shutdown and no shutdown commands on both the Branch1 switch uplink to the B1 router and the Main1 switch’s uplink to the M1 router.
B. Configure a backup GRE tunnel between the Main1 and Branch1 switches.
C. Enable UDLD recovery on both the Main1 and Branch1 switches.
D. Enable errdisable recovery on both the Main1 and Branch1 switches.
E. Configure a backup pseudowire between the Main1 and Branch1 switches.
Answer: AD
NEW QUESTION 712
Which statement about Auto-RP is true?
A. An RP that is tied to a loopback address must be configured.
B. All interfaces must be configured in sparse mode.
C. All interfaces must be configured in sparse-dense mode.
D. All interfaces must be configured in dense mode.
Answer: C
NEW QUESTION 713
Which technology can be used to secure the edge of an STP domain?
A. root guard
B. BPDU guard
C. UplinkFast
D. BPDU filter
Answer: A
NEW QUESTION 714
Which three features support object tracking? (Choose three.)
A. OSPF
B. BFD
C. EEM
D. HSRP
E. PfR
F. vPC
Answer: CDF
NEW QUESTION 715
Which GDOI key is responsible for encrypting control plane traffic?
A. The traffic encryption key
B. The key-chain
C. The preshared key
D. The key encryption key
Answer: D
NEW QUESTION 716
Which two statements about private VLAN communications are true? (Choose two.)
A. Promiscuous ports communicate with all other ports.
B. Primary VLAN traffic is passed across trunk interfaces.
C. Promiscuous ports connect only to routers.
D. Isolated ports communicate with other isolated ports.
Answer: AB
NEW QUESTION 717
Which three options are three of the valid message types for DHCPv6? (Choose three.)
A. Offer
B. Request
C. Leave
D. Solicit
E. Discover
F. Advertise
Answer: BDF
NEW QUESTION 718
Which IPv6 migration method allows IPv4-only devices to communicate with IPv6-only devices?
A. GRE tunnel
B. dual stack
C. ISATAP tunnel
D. NAT64
Answer: D
NEW QUESTION 719
Refer to the exhibit. While troubleshooting an issue with a blocked switch port, you find this error in the switch log. Which action should you take first to locate the problem?
……
A. Check the attached switch for a BPDU filter.
B. Test the link for unidirectional failures.
C. Check the attached switch for an interface configuration issue.
D. Execute the show interface command to check FastEthernet 0/1.
Answer: A
NEW QUESTION 720
Which three pieces of information are carried in OSPF type-3 LSAs? (Choose three.)
A. Forwarding address
B. IP subnet
C. Subnet mask
D. Authentication type
E. External route tag
F. Metric
Answer: ACF
NEW QUESTION 721
What is one requirement to support the IGMP proxy feature?
A. Devices on the unidirectional link must be in the same IP subnet.
B. Devices connected to a unidirectional link must disable Internet access.
C. IGMP snooping must be disabled.
D. PIM-DM must be enabled on all unidirectional links.
Answer: A
NEW QUESTION 722
Which routing protocol is incompatible with VRF-lite?
A. IS-IS
B. EIGRP
C. BGP
D. OSPF
Answer: B
NEW QUESTION 723
……
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