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NEW QUESTION 30
Users have been complaining that their Frame Relay connection to the corporate site is very slow. The network administrator suspects that the link is overloaded. Based on the partial output of the Router # show frame relay pvc command shown in the graphic, which output value indicates to the local router that traffic sent to the corporate site is experiencing congestion?
- A. in FECN packets 147
- B. DLCI=100
- C. last time PVC status changed 00:25:40
- D. in DF packets 0
- E. in BECN packets 192
Answer: E
Explanation:
First we should grasp the concept of BECN & FECN through an example:
Suppose Router A wants to send data to Router B through a Frame Relay network. If the network is congested, Switch 1 (a DCE device) will set the FECN bit value of that frame to 1, indicating that frame experienced congestion in the path from source to destination. This frame is forwarded to Switch 2 and to Router B (with the FECN bit = 1). Switch 1 knows that the network is congesting so it also sends frames back to Router A with BECN bit set to 1 to inform that path through the network is congested.
In general, BECN is used on frames traveling away from the congested area to warn source devices that congestion has occurred on that path while FECN is used to alert receiving devices if the frame experiences congestion.
BECN also informs the transmitting devices to slow down the traffic a bit until the network returns to normal state. The question asks "which output value indicates to the local router that traffic sent to the corporate site is experiencing congestion" which means it asks about the returned parameter which indicates congestion ->BECN.
NEW QUESTION 31
Which two options are valid WAN connectivity methods? (Choose two.)
- A. PPP
- B. Ethernet
- C. DSL
- D. L2TPv3
- E. WAP
Answer: A,C
NEW QUESTION 32
Which three statements are typical characteristics of VLAN arrangements? (Choose three.)
- A. A new switch has no VLANs configured.
- B. VLANs typically decrease the number of collision domains.
- C. A switch maintains a separate bridging table for each VLAN.
- D. VLANs cannot span multiple switches.
- E. Each VLAN uses a separate address space.
- F. Connectivity between VLANs requires a Layer 3 device.
Answer: C,E,F
Explanation:
By default, all ports on a new switch belong to VLAN 1 (default & native VLAN). There are also
some well-known VLANs (for example: VLAN 1002 for fddi-default; VLAN 1003 for token-ring...)
configured by default -> A is not correct.
To communicate between two different VLANs we need to use a Layer 3 device like router or
Layer 3 switch -> B is correct.
VLANs don't affect the number of collision domains, they are the same -> C is not correct.
Typically, VLANs increase the number of broadcast domains.We must use a different network (or
sub-network) for each VLAN. For example we can use 192.168.1.0/24 for VLAN 1, 192.168.2.0/24
for VLAN 2 -> D is correct.
A switch maintains a separate bridging table for each VLAN so that it can send frame to ports on
the same VLAN only. For example, if a PC in VLAN 2 sends a frame then the switch look-ups its
bridging table and only sends frame out of its ports which belong to VLAN 2 (it also sends this
frame on trunk ports) -> E is correct.
We can use multiple switches to expand VLAN -> F is not correct.
NEW QUESTION 33
A snack retailer runs an eight-week video campaign with attributed sales. The campaign targets snack lovers, gamers, and millennials. The test results are as follows:
What should the company test using experimental design to improve efficiency in number of exposures?
- A. Frequency capping
- B. Ad format
- C. Reach
- D. Target audience
Answer: B
NEW QUESTION 34
What are two drawbacks of implementing a link-state routing protocol? (Choose two.)
- A. the sequencing and acknowledgment of link-state packets
- B. the high demand on router resources to run the link-state routing algorithm
- C. the large size of the topology table listing all advertised routes in the converged network
- D. the requirement for a hierarchical IP addressing scheme for optimal functionality
- E. the high volume of link-state advertisements in a converged network
Answer: B,D
Explanation:
Link State routing protocols, such as OSPF and IS-IS, converge more quickly than their distance vector routing protocols such as RIPv1, RIPv2, EIGRP and so on, through the use of flooding and triggered updates. In link state protocols, changes are flooded immediately and computed in parallel. Triggered updates improve convergence time by requiring routers to send an update message immediately upon learning of a route change. These updates are triggered by some event, such as a new link becoming available oor an existing link failing. The main drawbacks to link state routing protocols are the amount of CPU overhead involved in calculating route changes and memory resources that are required to store neighbor tables, route tables and a complete topology table. http://www.ciscopress.com/articles/article.asp?p=24090&seqNum=4
NEW QUESTION 35
Which port state is introduced by Rapid-PVST?
- A. forwarding
- B. listening
- C. learning
- D. discarding
Answer: D
NEW QUESTION 36
Refer to the exhibit.
Why has this switch not been elected the root bridge for VLAN1?
- A. It has more than one interface that is connected to the root network segment.
- B. It has a higher bridge ID than the elected root bridge.
- C. It has a higher MAC address than the elected root bridge.
- D. It is running RSTP while the elected root bridge is running 802.1d spanning tree.
Answer: B
NEW QUESTION 37
A medium-sized travel business executes a digital strategy with a focus on building brand awareness for its new travel package. The advertiser runs a 4-cell Brand Lift test comparing the Engagement objective against other objectives. Assume the following results:
What strategy is most efficient to achieve the KPI?
- A. Engagement objective
- B. Reach objective
- C. Brand Awareness objective
- D. Traffic objective
Answer: B
NEW QUESTION 38
A longitudinal data set is missing values.
Which approach should be used to minimize bias in a forecast considering it is a small sample?
- A. Winsorization
- B. Dropping variables with missing values
- C. Linear interpolation
- D. Pairwise deletion
Answer: C
NEW QUESTION 39
Refer to the exhibit.
What is the meaning of the term dynamic as displayed in the output of the show frame-relay map command shown?
- A. The DLCI 100 was dynamically allocated by the router
- B. The Serial0/0 interface is passing traffic.
- C. The Serial0/0 interface acquired the IP address of 172.16.3.1 from a DHCP server
- D. The DLCI 100 will be dynamically changed as required to adapt to changes in the Frame Relay cloud
- E. The mapping between DLCI 100 and the end station IP address 172.16.3.1 was learned through Inverse ARP
Answer: E
Explanation:
The term dynamic indicates that the DLCI number and the remote router IP address 172.16.3.1 are learned via the Inverse ARP process. Inverse ARP is a technique by which dynamic mappings are constructed in a network, allowing a device such as a router to locate the logical network address and associate it with a permanent virtual circuit (PVC).
NEW QUESTION 40
A soda brand is presented the following results based on a marketing mix model to explain year-over-year sales change.
How should the competitive media value be interpreted?
- A. Competitive media yearly activity increased by 2.0%
- B. Competitive media yearly activity declined by 2.0%
- C. Competitive media generated a 2.0% sales decrease
- D. Competitive media generated a 2.0% sales increase
Answer: A
NEW QUESTION 41
Which term describes a spanning-tree network that has all switch ports in either the blocking or fowarding state?
- A. spanned
- B. converged
- C. redundant
- D. provisioned
Answer: B
NEW QUESTION 42
Refer to the exhibit.
C-router is to be used as a "router-on-a-stick" to route between the VLANs. All the interfaces have been properly configured and IP routing is operational. The hosts in the VLANs have been configured with the appropriate default gateway. What is true about this configuration?
- A. These commands need to be added to the configuration: C-router(config)# router eigrp 123 C-router(config-router)# network 172.19.0.0
- B. These commands need to be added to the configuration: C-router(config)# router ospf 1 C-router(config-router)# network 172.19.0.0 0.0.3.255 area 0
- C. No further routing configuration is required.
- D. These commands need to be added to the configuration: C-router(config)# router rip C-router(config-router)# network 172.19.0.0
Answer: C
Explanation:
http://www.cisco.com/en/US/tech/tk389/tk815/technologies_configuration_example09186a008009 49fd.shtml https://learningnetwork.cisco.com/servlet/JiveServlet/download/56692461/Router%20on%20a%20Stick.pdf.
NEW QUESTION 43
Which two states are the port states when RSTP has converged? (Choose two.)
- A. disabled
- B. listening
- C. learning
- D. forwarding
- E. discarding
Answer: D,E
Explanation:
Understanding Rapid Spanning Tree Protocol (802.1w)
http://www.cisco.com/en/US/tech/tk389/tk621/technologies_white_paper09186a0080094cfa.shtml
Port States There are only three port states left in RSTP that correspond to the three possible operational states. The 802.1D disabled, blocking, and listening states are merged into a unique 802.1w discarding state. RSTP only has 3 port states which are discarding, learning and forwarding. When RSTP has converged there are only 2 port states left: discarding and forwarding.
NEW QUESTION 44
Which three statements about HSRP operation are true? (Choose three.)
- A. HSRP supports up to 255 groups per interface, enabling an administrative form of load balancing.
- B. HSRP supports only clear-text authentication.
- C. The HSRP default timers are a 3 second hello interval and a 10 second dead interval.
- D. The HSRP virtual IP address must be the same as one of the router's interface addresses on the LAN.
- E. The HSRP virtual IP address must be on a different subnet than the routers' interfaces on the same LAN.
- F. The virtual IP address and virtual MA+K44C address are active on the HSRP Master router.
Answer: A,C,F
NEW QUESTION 45
What does the frame-relay interface-dlci command configure?
- A. remote DCLI on the subinterface
- B. local DLCI on the subinterface
- C. remote DLCI on the main interface
- D. local DLCI on the main interface
Answer: B
NEW QUESTION 46
Refer to the exhibit.
Hosts in network 192.168.2.0 are unable to reach hosts in network 192.168.3.0. Based on the output from RouterA, what are two possible reasons for the failure? (Choose two.)
- A. Interface S0/0 on RouterB is administratively down.
- B. The cable that is connected to S0/0 on RouterA is faulty.
- C. Interface S0/0 on RouterA is not receiving a clock signal from the CSU/DSU.
- D. Interface S0/0 on RouterA is configured with an incorrect subnet mask.
- E. The encapsulation that is configured on S0/0 of RouterB does not match the encapsulation that is configured on S0/0 of RouterA.
- F. The IP address that is configured on S0/0 of RouterB is not in the correct subnet.
Answer: C,E
NEW QUESTION 47
Refer to the exhibit.
The output that is shown is generated at a switch. Which three statements are true? (Choose three.)
- A. All interfaces that are shown are on shared media.
- B. All ports will be in a state of discarding, learning, or forwarding.
- C. All designated ports are in a forwarding state.
- D. Thirty VLANs have been configured on this switch.
- E. This switch must be the root bridge for all VLANs on this switch.
- F. The bridge priority is lower than the default value for spanning tree.
Answer: B,C,F
Explanation:
From the output, we see that all ports are in Designated role (forwarding state) -> A and E are
correct.
The command "show spanning-tree vlan 30 only shows us information about VLAN 30. We don't
know how many VLAN exists in this switch -> B is not correct.
The bridge priority of this switch is 24606 which is lower than the default value bridge priority
32768 -> C is correct.
All three interfaces on this switch have the connection type "p2p", which means Point-to-point
environment - not a shared media -> D is not correct.
The only thing we can specify is this switch is the root bridge for VLAN 3o but we can not
guarantee it is also the root bridge for other VLANs -> F is not correct.
NEW QUESTION 48
Which command enables IPv6 forwarding on a Cisco router?
- A. ipv6 host
- B. ipv6 unicast-routing
- C. ipv6 local
- D. ipv6 neighbor
Answer: B
Explanation:
http://www.ciscopress.com/articles/article.asp?p=31948&seqNum=4
The first step of enabling IPv6 on a Cisco router is the activation of IPv6 traffic forwarding to forward unicast IPv6 packets between network interfaces. By default, IPv6 traffic forwarding is disabled on Cisco routers. The ipv6 unicast-routing command is used to enable the forwarding of IPv6 packets between interfaces on the router. The syntax for this command is as follows: Router(config)#ipv6 unicast-routing The ipv6 unicast-routing command is enabled on a global basis.
NEW QUESTION 49
Which command is used to display the collection of OSPF link states?
- A. show ip ospf neighbors
- B. show ip ospf lsa database
- C. show ip ospf link-state
- D. show ip ospf database
Answer: D
Explanation:
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)
NEW QUESTION 50
Refer to the exhibit.
Hosts in network 192.168.2.0 are unable to reach hosts in network 192.168.3.0. Based on the output from RouterA, what are two possible reasons for the failure? (Choose two.)
- A. Interface S0/0 on RouterB is administratively down.
- B. The cable that is connected to S0/0 on RouterA is faulty.
- C. Interface S0/0 on RouterA is not receiving a clock signal from the CSU/DSU.
- D. Interface S0/0 on RouterA is configured with an incorrect subnet mask.
- E. The encapsulation that is configured on S0/0 of RouterB does not match the encapsulation that is configured on S0/0 of RouterA.
- F. The IP address that is configured on S0/0 of RouterB is not in the correct subnet.
Answer: C,E
Explanation:
http://www.cisco.com/en/US/docs/routers/access/800/819/software/configuration/Guide/6ser_conf. html
NEW QUESTION 51
Refer to the exhibit.
At the end of an RSTP election process, which access layer switch port will assume the discarding role?
- A. Switch3, port Gi0/2
- B. Switch3, port Gi0/1
- C. Switch3, port fa0/1
- D. Switch4, port fa0/2
- E. Switch3, port fa0/12
- F. Switch4, port fa0/11
Answer: F
NEW QUESTION 52
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