ccnp3 modulo 4 exam

8/7/2019 ccnp3 modulo 4 exam

1/7

1 What statement is true regarding TCAM memory in CEF switching?

TCAM includes only Layer 3 lookup information.

A single lookup provides Layer 2, Layer 3, and ACL information.

TCAM lookup tables are only used for the Layer 3 forwarding operation.

TCAM lookup tables are only used for the rapid processing of ACLs within CEF.

2 Which three statements regarding switched virtual interfaces (SVI) are true? (Choose

three.)

A routed port is an alternative to an SVI that is created with the switchport mode

routed interface configuration command.

An SVI is a virtual Layer 3 interface that can be configured for any VLAN that exists

on a Layer 3 switch.

An SVI can provide a default gateway for a VLAN so traffic can be routed between

VLANs.

For redundancy, a VLAN can have more than one SVI associated to it.

SVIs are created by entering VLAN interface configuration mode and assigning an IP

address.

SVIs must be explicitly configured for all VLANs.

3 Which packets will not be processed by Cisco Express Forwarding (CEF) and must be

processed by the Layer 3 engine? (Choose three.)

packets destined for a tunnel interface

packets that use UDP header options

packets that exceed the maximum transmission unit (MTU) of the output interface

packets that use TCP header options

packets that use IP header options

4 What happens when the CEF TCAM table is full?The packet will be dropped.

The longest match in the table will be used.

The shortest match in the table will be used.

A wildcard entry will force the packet to route via the route table.

5 CEF is enabled globally. However, for testing purposes, CEF was disabled on interface

GigabitEthernet 0/2. Which command would re-enable CEF on the interface?

Switch(config)# ip cef enable

Switch(config)# ip route-cache cef

Switch(config)# ip route-cefSwitch(config)# interface gi 0/2

Switch(config-if)# ip cef enable

Switch(config)# interface gi 0/2Switch(config-if)# ip route-cache cef

Switch(config)# interface gi 0/2

Switch(config-if)# ip route-cef
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2/7

6 In which two modes can Cisco Express Forwarding (CEF) operate? (Choose two.)

central CEF mode

distributed CEF (dCEF) mode

enhanced CEF mode

forwarding CEF (fCEF) mode

process CEF mode

7 Which two statements referring to CEF tables are true? (Choose two.)

CEF IP destination prefixes are stored in the TCAM table from the least specific to themost specific entry.

The adjacency table is derived from the ARP table, and it contains Layer 2 rewrite

(MAC) information for the next hop.

The Forwarding Information Base (FIB) lookup is based on the Layer 2 destinationMAC addresses.

The Forwarding Information Base (FIB) is derived from the IP routing table and is

arranged for maximum lookup throughput.

When the CEF TCAM table is full, a static entry redirects the frame to the Layer 2engine.

8

Refer to the exhibit. Which statement is true regarding the diagram and show ip route

command output?
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3/7

The router will not forward packets between workstations because no routing protocol

has been configured.

The default gateway for hosts on VLAN 10 should be the Fa0/0 IP address of therouter.

The default gateway for hosts on VLAN 10 should be the Fa0/0.1 IP address of the

router.The default gateway for hosts on VLAN 10 should be the Fa0/0.2 IP address of the

router.

Hosts on VLAN 10 do not need a default gateway since their packets are beingtrunked.

9 Which command should be entered to turn a physical switch port/interface into a Layer 3

port?

Switch(config-if)#routerport

Switch(config-if)#switchport layer3

Switch(config-if)#switchport off

Switch(config-if)#no switchportSwitch(config-if)#routerport on

10

Refer to the exhibit. Which statement is true about the configuration?

VLAN subinterfaces can be created for interface VLAN 10.

A virtual VLAN interface can be created for the default VLAN (VLAN 1) only.Interface VLAN 10 will not support routing or bridging function in the system.

Interface VLAN 10 will support routing or bridging function in the system.

11 What is a primary reason to use a trunk link to connect a switch to an external router that

is providing interVLAN routing?

fewer router and switch ports are used

high bandwidth

ease of MLS integration

reduction of CPU overhead

router cpu is well-matched to the connected switch

12
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4/7

Refer to the exhibit. An administrator wants to ensure that CEF is functioning properlybetween Host A and Host B. If the administrator wants to verify the CEF FIB table entry

for the route 10.10.5.0/24 on Sw_MLSA, what should the adjacency IP address be?

10.10.10.2

10.10.10.1

10.10.5.1

10.10.5.2

13 Which two statements are true regarding routed ports on a multilayer switch? (Choose

two.)

A routed port behaves like a regular router interface and supports VLANsubinterfaces.

A routed port is a physical switchport with Layer 2 capability.A routed port is not associated with a particular VLAN.

To create a routed port requires removal of Layer 2 port functionality with the no

switchport interface configuration command.

The interface vlan global configuration command is used to create a routed port.

14
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5/7

Refer to the exhibit. The router has been properly configured for the trunking interface.Which statement is true regarding the routing table on the router?

It will show a next hop address of the switch for both VLANs.

It will show one trunking route to 10.0.0.0/8.

It should contain routes to the 10.10.10.0/24 and the 10.10.11.0/24 networks.It will not show routes to either VLAN because the switch is not configured properly

to trunk VLAN 1 and VLAN 2.

It will not show any routes because the switch port fa0/1 is in access mode.

15 Which two statements are true about the Forwarding Information Base (FIB) table?

(Choose two.)

The FIB table uses ACLs to determine matches.
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6/7

The FIB table is based on CDP packets received by the router.

The FIB table is generated from the contents of the routing table.

The FIB table lookups are performed based on destination MAC address.

The FIB table will update if an ARP entry for a destination next hop changes.

16 Which statement is true regarding the CEF-forwarding process?

The FIB table contains the Layer 2 rewrite information.

The adjacency table eliminates the need for the ARP protocol.

After an IP prefix match is made, the process refers to the adjacency table to

determine a Layer 2 next hop address.

Adjacency table lookups are based upon the closest Layer 3 prefix match.

17

Refer to the exhibit and the partial configuration taken on routers RTA and RTB. All

users can ping their gateways, but users on VLAN 5 and VLAN 10 cannot communicate

with the users on VLAN 20. What should be done to solve the problem?

A dynamic routing protocol or static routes should be configured on the routers.

A trunk should be configured between routers RTA and RTB.
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7/7

RTAs interface Fa0/1 and RTBs Fa0/1 should be configured with three subinterfaceswith ISL encapsulation.

RTAs interface Fa0/1 and RTBs Fa0/1 should be configured with three subinterfaceswith 802.1Q encapsulation.

ccnp3 modulo 4 exam

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