SRWE Final Exam Flashcards by Richard Perry

Refer to the exhibit. What will router R1 do with a packet that has a destination IPv6 address of 2001:db8:cafe:5::1?

forward the packet out GigabitEthernet0/0

drop the packet

forward the packet out GigabitEthernet0/1

forward the packet out Serial0/0/0

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Refer to the exhibit. Currently router R1 uses an EIGRP route learned from Branch2 to reach the 10.10.0.0/16 network. Which floating static route would create a backup route to the 10.10.0.0/16 network in the event that the link between R1 and Branch2 goes down?

ip route 10.10.0.0 255.255.0.0 Serial 0/0/0 100

ip route 10.10.0.0 255.255.0.0 209.165.200.226 100

ip route 10.10.0.0 255.255.0.0 209.165.200.225 100

ip route 10.10.0.0 255.255.0.0 209.165.200.225 50

ip route 10.10.0.0 255.255.0.0 209.165.200.225 100

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Refer to the exhibit. R1 was configured with the static route command ip route 209.165.200.224 255.255.255.224 S0/0/0 and consequently users on network 172.16.0.0/16 are unable to reach resources on the Internet. How should this static route be changed to allow user traffic from the LAN to reach the Internet?

Add an administrative distance of 254.

Change the destination network and mask to 0.0.0.0 0.0.0.0

Change the exit interface to S0/0/1.

Add the next-hop neighbor address of 209.165.200.226

Change the destination network and mask to 0.0.0.0 0.0.0.0

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Refer to the exhibit. A network administrator has connected two switches together using EtherChannel technology. If STP is running, what will be the end result?

STP will block one of the redundant links.

The switches will load balance and utilize both EtherChannels to forward packets.

The resulting loop will create a broadcast storm.

Both port channels will shutdown.

STP will block one of the redundant links.

Cisco switches support two protocols for negotiating a channel between two switches: LACP and PAgP. PAgP is Cisco-proprietary. In the topology shown, the switches are connected to each other using redundant links. By default, STP is enabled on switch devices. STP will block redundant links to prevent loops.

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What is a secure configuration option for remote access to a network device?

Configure an ACL and apply it to the VTY lines.

Configure 802.1x.

Configure SSH.

Configure Telnet.

Configure SSH.

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Which wireless encryption method is the most secure?

WPA2 with AES

WPA2 with TKIP

WEP

WPA

WPA2 with AES

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After attaching four PCs to the switch ports, configuring the SSID and setting authentication properties for a small office network, a technician successfully tests the connectivity of all PCs that are connected to the switch and WLAN. A firewall is then configured on the device prior to connecting it to the Internet. What type of network device includes all of the described features?

firewall appliance

wireless router

switch

standalone wireless access point

wireless router

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Refer to the exhibit. Host A has sent a packet to host B. What will be the source MAC and IP addresses on the packet when it arrives at host B?

Source MAC: 00E0.FE91.7799
Source IP: 10.1.1.10

Source MAC: 00E0.FE10.17A3
Source IP: 10.1.1.10

Source MAC: 00E0.FE10.17A3
Source IP: 192.168.1.1

Source MAC: 00E0.FE91.7799
Source IP: 10.1.1.1

Source MAC: 00E0.FE91.7799
Source IP: 192.168.1.1

Source MAC: 00E0.FE91.7799
Source IP: 10.1.1.10

Explanation: As a packet traverses the network, the Layer 2 addresses will change at every hop as the packet is de-encapsulated and re-encapsulated, but the Layer 3 addresses will remain the same.

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Refer to the exhibit. In addition to static routes directing traffic to networks 10.10.0.0/16 and 10.20.0.0/16, Router HQ is also configured with the following command:

ip route 0.0.0.0 0.0.0.0 serial 0/1/1

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What is the purpose of this command?

Packets that are received from the Internet will be forwarded to one of the LANs connected to R1 or R2.

Packets with a destination network that is not 10.10.0.0/16 or is not 10.20.0.0/16 or is not a directly connected network will be forwarded to the Internet.

Packets from the 10.10.0.0/16 network will be forwarded to network 10.20.0.0/16, and packets from the 10.20.0.0/16 network will be forwarded to network 10.10.0.0/16.

Packets that are destined for networks that are not in the routing table of HQ will be dropped.

Packets with a destination network that is not 10.10.0.0/16 or is not 10.20.0.0/16 or is not a directly connected network will be forwarded to the Internet.

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What protocol or technology disables redundant paths to eliminate Layer 2 loops?

VTP

STP

EtherChannel

DTP

STP

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Refer to the exhibit. Based on the exhibited configuration and output, why is VLAN 99 missing?

because VLAN 99 is not a valid management VLAN

because there is a cabling problem on VLAN 99

because VLAN 1 is up and there can only be one management
VLAN on the switch

because VLAN 99 has not yet been created

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Which two VTP modes allow for the creation, modification, and deletion of VLANs on the local switch? (Choose two.)

client
master
distribution
slave
server
transparent

server
transparent

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Which three steps should be taken before moving a Cisco switch to a new VTP management domain? (Choose three.)

Configure the switch with the name of the new management domain.

Reset the VTP counters to allow the switch to synchronize with the other switches in the domain.

Configure the VTP server in the domain to recognize the BID of the new switch.

Download the VTP database from the VTP server in the new domain.

Select the correct VTP mode and version.

Reboot the switch.

Configure the switch with the name of the new management domain.

Select the correct VTP mode and version.

Reboot the switch.

Explanation: When adding a new switch to a VTP domain, it is critical to configure the switch with a new domain name, the correct VTP mode, VTP version number, and password. A switch with a higher revision number can propagate invalid VLANs and erase valid VLANs thus preventing connectivity for multiple devices on the valid VLANs.

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A network administrator is preparing the implementation of Rapid PVST+ on a production network. How are the Rapid PVST+ link types determined on the switch interfaces?

Link types can only be configured on access ports configured with a single VLAN.

Link types can only be determined if PortFast has been configured.

Link types are determined automatically.

Link types must be configured with specific port configuration commands.

Link types are determined automatically.

Explanation: When Rapid PVST+ is being implemented, link types are automatically determined but can be specified manually. Link types can be either point-to-point, shared, or edge.

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Refer to the exhibit. All the displayed switches are Cisco 2960 switches with the same default priority and operating at the same bandwidth. Which three ports will be STP designated ports? (Choose three.)

fa0/9

fa0/13

fa0/10

fa0/20

fa0/21

fa0/11

fa0/13

fa0/10

fa0/21

How will a router handle static routing differently if Cisco Express Forwarding is disabled?

It will not perform recursive lookups.

Ethernet multiaccess interfaces will require fully specified static routes to avoid routing inconsistencies.

Static routes that use an exit interface will be unnecessary.

Serial point-to-point interfaces will require fully specified static routes to avoid routing inconsistencies.

Ethernet multiaccess interfaces will require fully specified static routes to avoid routing inconsistencies.

Explanation: In most platforms running IOS 12.0 or later, Cisco Express Forwarding is enabled by default. Cisco Express Forwarding eliminates the need for the recursive lookup. If Cisco Express Forwarding is disabled, multiaccess network interfaces require fully specified static routes in order to avoid inconsistencies in their routing tables. Point-to-point interfaces do not have this problem, because multiple end points are not present. With or without Cisco Express Forwarding enabled, using an exit interface when configuring a static route is a viable option.

Compared with dynamic routes, what are two advantages of using static routes on a router? (Choose two.)

They improve network security.

They take less time to converge when the network topology changes.

They improve the efficiency of discovering neighboring networks.

They use fewer router resources.

They improve network security.

They use fewer router resources.

Explanation: Static routes are manually configured on a router. Static routes are not automatically updated and must be manually reconfigured if the network topology changes. Thus static routing improves network security because it does not make route updates among neighboring routers. Static routes also improve resource efficiency by using less bandwidth, and no CPU cycles are used to calculate and communicate routes

Refer to the exhibit. Which route was configured as a static route to a specific network using the next-hop address?

S 10.17.2.0/24 [1/0] via 10.16.2.2

S 0.0.0.0/0 [1/0] via 10.16.2.2

S 10.17.2.0/24 is directly connected, Serial 0/0/0

C 10.16.2.0/24 is directly connected, Serial0/0/0

S 10.17.2.0/24 [1/0] via 10.16.2.2

Explanation: The C in a routing table indicates an interface that is up and has an IP address assigned. The S in a routing table signifies that a route was installed using the ip route command. Two of the routing table entries shown are static routes to a specific destination (the 192.168.2.0 network). The entry that has the S denoting a static route and [1/0] was configured using the next-hop address. The other entry (S 192.168.2.0/24 is directly connected, Serial 0/0/0) is a static route configured using the exit interface. The entry with the 0.0.0.0 route is a default static route which is used to send packets to any destination network that is not specifically listed in the routing table.

What is the effect of entering the spanning-tree portfast configuration command on a switch?

It disables an unused port.

It disables all trunk ports.

It enables portfast on a specific switch interface.

It checks the source L2 address in the Ethernet header against the sender L2 address in the ARP body.

It enables portfast on a specific switch interface.

What is the IPv6 prefix that is used for link-local addresses?

FF01::/8

2001::/3

FC00::/7

FE80::/10

Explanation: The IPv6 link-local prefix is FE80::/10 and is used to create a link-local IPv6 address on an interface

Which two statements are characteristics of routed ports on a multilayer switch? (Choose two.)

In a switched network, they are mostly configured between switches at the core and distribution layers.

The interface vlan command has to be entered to create a VLAN on routed ports.

They support subinterfaces, like interfaces on the Cisco IOS routers.

They are used for point-to-multipoint links.

They are not associated with a particular VLAN.

In a switched network, they are mostly configured between switches at the core and distribution layers.

They are not associated with a particular VLAN.

Successful inter-VLAN routing has been operating on a network with multiple VLANs across multiple switches for some time. When an inter-switch trunk link fails and Spanning Tree Protocol brings up a backup trunk link, it is reported that hosts on two VLANs can access some, but not all the network resources that could be accessed previously. Hosts on all other VLANS do not have this problem. What is the most likely cause of this problem?

The protected edge port function on the backup trunk interfaces has been disabled.

The allowed VLANs on the backup link were not configured correctly.

Dynamic Trunking Protocol on the link has failed.

Inter-VLAN routing also failed when the trunk link failed.

The protected edge port function on the backup trunk interfaces has been disabled.

Which command will start the process to bundle two physical interfaces to create an EtherChannel group via LACP?

interface port-channel 2

channel-group 1 mode desirable

interface range GigabitEthernet 0/4 – 5

channel-group 2 mode auto

interface range GigabitEthernet 0/4 – 5

What action takes place when a frame entering a switch has a multicast destination MAC address?

The switch will forward the frame out all ports except the incoming port.

The switch forwards the frame out of the specified port.

The switch adds a MAC address table entry mapping for the destination MAC address and the ingress port.

The switch replaces the old entry and uses the more current port.

The switch will forward the frame out all ports except the incoming port.

Explanation: If the destination MAC address is a broadcast or a multicast, the frame is also flooded out all ports except the incoming port.

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SRWE Final Exam Flashcards

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