Which method of Layer 3 switching uses a forwarding information base (FIB)?
A.
Topology-based switching
B.
Demand-based switching
C.
Route caching
D.
Flow-based switching
E.
None of the other alternatives apply
Explanation:
The Layer 3 engine (essentially a router) maintains routing information, whether from static
routes or dynamic routing protocols. Basically, the routing table is reformatted into an
ordered list with the most specific route first, for each IP destination subnet in the table. The
new format is called a Forwarding Information Base (FIB) and contains routing or forwarding
information that the network prefix can reference.
In other words, a route to 10.1.0.0/16 might be contained in the FIB, along with routes to
10.1.1.0/24 and 10.1.1.128/25, if those exist. Notice that these examples are increasingly
more specific subnets. In the FIB, these would be ordered with the most specific, or longest
match, first, followed by less specific subnets. When the switch receives a packet, it can
easily examine the destination address and find the longest match entry in the FIB. The FIB
also contains the next-hop address for each entry. When a longest match entry is found in
the FIB, the Layer 3 next-hop address is found, too.
A.- el actual CEF utiliza informacion basada en la topologia para forwardear el trafico. anterirmente se utilizaba router-chaching y flow-based switching
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A. Topology based switching.
Its a evaqulant of the cisco Expres forwarding (CEF)
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Correct Answer: A
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New Official 300-115 Exam Dumps.v.2017-08-14
QUESTION 399
Which two commands sequences must you enter on a pair switches so that they negotiate? (Choose 2)
A. channel-protocol lacp
channel-group 1 mode auto
B. channel-protocol lacp
channel-group 1 mode passive
C. channel-protocol pagp
channel-group 1 mode on
D. channel-protocol pagp
channel-group 1 mode auto
E. channel-protocol lacp
channel-group 1 mode active
Answer: BE
QUESTION 400
Which two prerequisites for HSRP to become active on an interface are true? (Choose 2)
A. Cisco Express Forwarding must be disabled globally.
B. The VIP must be in the same subnet as the primary IP address.
C. A Virtual-MAC address must be configured on the interface.
D. An IP address must be configured on the interface.
E. PIM routing must be disabled on the interface.
Answer: BD
QUESTION 401
Which two authentication types does VRRP support? (Choose Two)
A. Plain-text
B. CHAP
C. PAP
D. 802.1X
E. MD5
Answer: AE
Explanation:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp_fhrp/configuration/12-4/fhp-12-4-book/fhp-vrrp.html#GUID-B1CB24C0-2526-4790-A701-0105FDA69FC8
QUESTION 402
Which two limitations of LOCAL SPAN are true? (Choose Two)
A. The source and destination ports must reside in the same switch or switch stack
B. It can monitor only traffic that ingresses or egresses on the source interface or VLAN.
C. A SPAN session can support multiple destination ports only if they are on the same VLAN.
D. EACH SPAN session supports only one source VLAN or interface.
E. A switch can support only one local SPAN session at a time.
Answer: AE
QUESTION 403
Which Statement about the default SWITCH Database Management Template is true?
A. Template disables routing and supports the maximum number of unicast MAC addresses
B. Template maximizes system resources for access control lists.
C. Template maximizes system resources for unicast routing.
D. Template gives balance to all functions
Answer: D
Explanation:
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/configuration/guide/3750xscg/swsdm.pdf
Default – The default template gives balance to all functions.
QUESTION 404
Which results happens when a non-trunking port that is configured with BPDU guard is connected to a device that is transmitting?
A. The port is moved into the spanning-tree blocking state.
B. There port is error-disabled.
C. A routing loop can occur on the network.
D. The port transitions to the connected state.
Answer: B
QUESTION 405
Which two settings are the parts of a Default LLDP configuration? (Choose Two)
A. The LLDP hold time is 60 seconds.
B. The LLDP global state is Disabled.
C. The LLDP reinitialisation delay is 5 seconds.
D. The LLDP interface state is Enabled.
E. The LLDP timer is 60 seconds.
Answer: BD
Explanation:
https://www.cisco.com/c/en/us/td/docs/routers/ncs6000/software/ncs6k_r5-2/interfaces/configuration/guide/b-interfaces-cg-ncs6k-52x/b-interfaces-cg-ncs6k- 52x_chapter_011.html#con_1061862
Table 4 LLDP Default Configuration
LLDP global state = Disabled
LLDP interface state = Enabled for both transmit and receive operations when LLDP is globally enabled.
QUESTION 407
Which two statements about GLBP are true? (Choose Two)
A. The AVF responds to ARP request for the virtual IP address.
B. LAN client traffic is handled by the active AVF only.
C. The AVG assigns virtual MAC addresses to GLBP group members.
D. The AVF assigns virtual MAC addresses to GLBP group members.
E. The AVG responds to ARP requests for the Virtual IP address.
Answer: CE
Explanation:
https://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html#wp1039649
The AVG assigns a virtual MAC address to each member of the GLBP group.
The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP address.
QUESTION 408
Which option is a CISCO recommended RSPAN configuration practice?
A. Define RSPAN VLAN before configuring an RSPAN source and destination session.
B. Assign access ports to an RSPAN VLAN like any other campus VLAN.
C. Use a different RSPAN VLAN for each session if configuring RSPAN on multiple switches.
D. Use only one destination port for EACH RSPAN Session.
Answer: A
Explanation:
http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-6500-series-switches/prod_white_paper0900aecd805457cc.html
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QUESTION 126
Refer to the exhibit, which statement abort the current configuration on port GigabitEthernet2/0/1 is true?
A. It is an access port configured for a phone and a PC
B. It is a trunk port and the native VLAN is VLAN1
C. It is a trunk port and the natrve VL AN m VLAN 700
D. It is an access port in VLAN 700
Answer: B
QUESTION 127
Which two options are advantages of deploying VTPv3? (Choose two)
A. It stores the VTP domain password securely as a SHA-1 hash
B. It adds on FCS field at the end of each VTP frame for consistency checking
C. It supports the propagation of private VLANs.
D. It supports the use of AES to encrypt VTP messaging
E. It can be configured to allow only one VTP server to make changes to the VTP domain
Answer: CE
QUESTION 128
What percentage of bandwidth is reduced when a stack cable is broken?
A. 0
B. 25
C. 50
D. 75
E. 100
Answer: C
QUESTION 129
Refer to the exhibit. Which set of configurations will result in all ports on both switches successfully bundling into an EtherChannel?
A. switch1
channel-group 1 mode active
switch2
channel-group 1 mode auto
B. switch1
channel-group 1 mode desirable
switch2
channel-group 1 mode passive
C. switch1
channel-group 1 mode on
switch2
channel-group 1 mode auto
D. switch1
channel-group 1 mode desirable
switch2
channel-group 1 mode auto
Answer: D
QUESTION 130
Refer to the exhibit. How can the traffic that is mirrored out the GigabitEthernet0/48 port be limited to only traffic that is received or transmitted in VLAN 10 on the GigabitEthernet0/1 port?
A. Change the configuration for GigabitEthernet0/48 so that it is a member of VLAN 10.
B. Add an access list to GigabitEthernet0/48 to filter out traffic that is not in VLAN 10.
C. Apply the monitor session filter globally to allow only traffic from VLAN 10.
D. Change the monitor session source to VLAN 10 instead of the physical interface.
Answer: C
QUESTION 131
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: BCD
QUESTION 132
After an EtherChannel is configured between two Cisco switches, interface port channel 1 is in the down/down state. Switch A is configured with channel-group 1 mode active, while Switch B is configured with channel-group 1 mode desirable. Why is the EtherChannel bundle not working?
A. The switches are using mismatched EtherChannel negotiation modes.
B. The switch ports are not configured in trunking mode.
C. LACP priority must be configured on both switches.
D. The channel group identifier must be different for Switch A and Switch B.
Answer: A
QUESTION 133
Which feature must be enabled to eliminate the broadcasting of all unknown traffic to switches that are not participating in the specific VLAN?
A. VTP pruning
B. port-security
C. storm control
D. bpdguard
Answer: A
QUESTION 134
Refer to the exhibit. The users in an engineering department that connect to the same access switch cannot access the network. The network engineer found that the engineering VLAN is missing from the database. Which action resolves this problem?
A. Disable VTP pruning and disable 802.1q.
B. Update the VTP revision number.
C. Change VTP mode to server and enable 802.1q.
D. Enable VTP pruning and disable 802.1q.
Answer: C
Explanation:
Only VTP servers can add new VLANs to the switched network, so to enable vlan 10 on this switch you will first need to change the VTP mode from client to server.
Then, you will need to enable 802.1Q trunking to pass this new VLAN along to the other switches.
QUESTION 135
A network engineer wants to ensure Layer 2 isolation of customer traffic using a private VLAN. Which configuration must be made before the private VLAN is configured?
A. Disable VTP and manually assign VLANs.
B. Ensure all switches are configured as VTP server mode.
C. Configure VTP Transparent Mode.
D. Enable VTP version 3.
Answer: C
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