Cisco SRWE Quizzes
Which packet-forwarding method does a router use to make switching decisions when it is using a forwarding information base and an adjacency table?
CEF
Which DHCP IPv4 message contains the following information? Destination address: 255.255.255.255 Client IPv4 address: 0.0.0.0 Default gateway address: 0.0.0.0 Subnet mask: 0.0.0.0
DHCPDISCOVER
What kind of message is sent by a DHCPv4 client requesting an IP address?
DHCPDISCOVER broadcast message
As a DHCPv4 client lease is about to expire, what is the message that the client sends the DHCP server?
DHCPREQUEST
A DHCP-enabled client PC has just booted. During which two steps will the client PC use broadcast messages when communicating with a DHCP server? (Choose two.)
DHCPREQUEST DHCPDISCOVER
Under which two circumstances would a router usually be configured as a DHCPv4 client? (Choose two.)
ISP requirement, router is intended to be used as a SOHO gateway
What value determines the root bridge when all switches connected by trunk links have default STP configurations?
MAC address
What additional information is contained in the 12-bit extended system ID of a BPDU?
VLAN ID
What is an advantage of using dynamic routing protocols instead of static routing?
able to actively search for new routes if the current path becomes unavailable
Which statement is true about broadcast and collision domains?
adding a switch to a network will increase the size of the broadcast domain
Which value represents the "trustworthiness" of a route and is used to determine which route to install into the routing table when there are multiple routes toward the same destination?
administrative distance
The output of the show ip route command contains the following entry: S 10.2.0.0 [1/0] via 172.16.2.2. What value is indicated by the 1 in the [1/0] portion of the output?
administrative distance [AD/Metric]
During the implementation of Spanning Tree Protocol, all switches are rebooted by the network administrator. What is the first step of the spanning-tree election process?
all the switches send out BPDUs advertising themselves as the root bridge
A Cisco switch currently allows traffic tagged with VLANs 10 and 20 across trunk port Fa0/5. What is the effect of issuing a switchport trunk allowed vlan 30 command on Fa0/5?
allows only vlan 30 on fa0/5
Which address does a DHCPv4 server target when sending a DHCPOFFER message to a client that makes an address request?
client hardware address
When a client is requesting an initial address lease from a DHCP server, why is the DHCPREQUEST message sent as a broadcast?
client may have received offers from multiple servers and the broadcast serves to implicitly decline those other offers
An administrator issues the commands: Router(config)# interface g0/1 Router(config-if)# ip address dhcp What is the administrator trying to achieve?
configuring the router to obtain IP parameters from a DHCPv4 server
A network administrator has configured VLAN 99 as the management VLAN and has configured it with an IP address and subnet mask. The administrator issues the show interface vlan 99 command and notices that the line protocol is down. Which action can change the state of the line protocol to up?
connect a host to an interface associated with VLAN99
While configuring inter-VLAN routing on a multilayer switch, a network administrator issues the no switchport command on an interface that is connected to another switch. What is the purpose of this command?
create a routed port for a single network
What type of Ethernet cable would be used to connect one switch to another switch when neither switch supports the auto-MDIX feature?
crossover
Which type of route would typically be used on a border router so that devices inside the company could access the Internet?
default router
Which type of static route creates a gateway of last resort?
default static route
What are two common types of static routes in routing tables? (Choose two)
default static router static route to specific network
What is an accurate description of redundancy?
designing a network to use multiple paths between switches to ensure there is no single point of failure
Which three port states are used by Rapid PVST+? (Choose three.)
discarding forwarding learning
What are two functions of dynamic routing protocols? (Choose two.)
discover the network maintain routing tables
If more than one DHCP server is available on the local network, in which order will DHCP messages be sent between a host and a DHCP server?
discover, offer, request, acknowledgment
Which three advantages are provided by static routing? (Choose three.)
does not advertise over the network (better security) path a static route uses to send data is known typically uses less network bandwidth and fewer cpu ops than dynamic does
What is a disadvantage of using router-on-a-stick inter-VLAN routing?
does not scale well beyond 50 vlans
Which is a DHCPv4 address allocation method that assigns IPv4 addresses for a limited lease period?
dynamic allocation
After the election of the root bridge has been completed, how will switches find the best paths to the root bridge?
each switch will analyze the sum of all port costs to reach the root and use the path with the lowest cost
Which two concepts relate to a switch port that is intended to have only end devices attached and intended never to be used to connect to another switch? (Choose two.)
edge port portfast
What advantage does SSH offer over Telnet?
encryption
In which location are the normal range VLANs stored on a Cisco switch by default?
flash
In which memory location are the VLAN configurations of normal range VLANs stored on a Catalyst switch?
flash
Where is the vlan.dat file stored on a switch?
flash memory
What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?
forward the frame out all ports except the port where it is received
Which port state will switch ports immediately transition to when configured for PortFast?
forwarding
Which switch characteristic helps alleviate network congestion when a 10 Gbps port is forwarding data to a 1 Gbps port?
frame buffering
What is the purpose of the vlan.dat file on a switch?
holds the VLAN database
Which statement describes the system LED operation on Cisco Catalyst switches?
if the LED is amber, the system is receiving power but it is not functioning properly
What is the most likely scenario in which the WAN interface of a router would be configured as a DHCP client to be assigned a dynamic IP address from an ISP?
it is a SOHO or home broadband router
When PVST is running over a switched network, which port state can participate in BPDU frame forwarding based on BPDUs received, but does not forward data frames?
listening
What is the first action in the boot sequence when a switch is powered on?
load a power-on self-test program
Which distinct type of VLAN is used by an administrator to access and configure a switch?
management vlan
What is one way to correct a spanning tree failure?
manually remove the redundant links in the switched network
A PC is to access a web server on another network. Which inter-VLAN method will provide the highest bandwidth at Layer 3 and also provide a default gateway for the PC?
multilayer switch with routing enabled
What is a disadvantage of using multilayer switches for inter-VLAN routing?
multilayer switches are more expensive than router on a stick implementations
When a Cisco switch receives untagged frames on a 802.1Q trunk port, which VLAN ID is the traffic switched to by default?
native vlan id
What must an administrator have in order to reset a lost password on a router?
physical access to the router
What happens to a port that is associated with VLAN 10 when the administrator deletes VLAN 10 from the switch?
port becomes inactive
Which tasks can be accomplished by using the command history feature? (Choose two.)
recall previously entered commands set the command history buffer size
Which STP port role is adopted by a switch port if there is no other port with a lower cost to the root bridge?
root port
Which network device can serve as a boundary to divide a Layer 2 broadcast domain?
router
Which type of inter-VLAN communication design requires the configuration of multiple subinterfaces?
router on a stick
Which scalable method must be implemented in order to provide inter-VLAN routing on a switched network with more than 1000 VLANs?
routing traffic internally to a layer 3 switch device
On a Cisco switch, where is extended range VLAN information stored?
running config
What are three primary benefits of using VLANs? (Choose two.)
security cost reduction
How is a DHCPDISCOVER transmitted on a network to reach a DHCP server?
sent with the broadcast IP address as the destination address
What is the purpose of setting the native VLAN separate from data VLANs?
separate vlan should be used to carry uncommon untagged frames to avoid bandwidth contention on data vlans
Which command will provide information about the status of all interfaces including the number of giants, runts, and collisions on the interface?
show interfaces
An administrator was troubleshooting a router-on-a-stick topology and concluded that the problem was related to the configuration of VLANs on the router subinterfaces. Which two commands can the administrator use in the router to identify the problem? (Choose two.)
show running-config show ip interface
An administrator is troubleshooting a switch and wants to verify if it is a root bridge. What command can be used to do this?
show spanning-tree
Which type of address does a switch use to build the MAC address table?
source MAC address
Which information does a switch use to keep the MAC address table information current?
source MAC address and incoming port
What are two reasons why an administrator might choose to use static routing rather than dynamic routing? (Choose two.)
static uses less router processing and bandwidth static is more secure
Which option correctly describes a switching method?
store and forward: ensures that the frame is free of physical and data link errors
An administrator is investigating a failure on a trunk link between a Cisco switch and a switch from another vendor. After a few show commands, the administrator notices that the switches are not negotiating a trunk. What is a probable cause for this issue?
switches from other vendors dont support DTP
When a router learns that multiple paths are available to a destination network from the same routing protocol, which factor is considered by a router to choose the best path to forward a packet?
the lowest metric
What does the term "port density" represent for an Ethernet switch?
the number of ports available
A network administrator enters the following command sequence on a Cisco 3560 switch. What is the purpose of these commands? Switch(config)# interface gigabitethernet 0/1Switch(config-if)# no switchport
to make the gi0/1 port a routed port
What is the reason why the DHCPREQUEST message is sent as a broadcast during the DHCPv4 process?
to notify other DHCP servers on the subnet that the IP address was leased
When configuring a router as part of a router-on-a-stick inter-VLAN routing topology, where should the IP address be assigned?
to the sub interface
For what reason would a network administrator use the show interfaces trunk command on a switch?
to view the native vlan
How is traffic routed between multiple VLANs on a multilayer switch?
traffic is routed via internal vlan interfaces
What operational mode should be used on a switch port to connect it to a router for router-on-a-stick inter-VLAN routing?
trunk
Which two statements are true about half-duplex and full-duplex communications? (Choose two.)
- full dup allows both ends to transmit and receive simultaneously - full dup increases the effective bandwidth
Which two statements describe a switch port that is configured with PortFast? (Choose two.)
1. the switchport should never receive BPDUs 2. the switch port immediately transitions from blocking to the forwarding state
What is the destination IP address when an IPv4 host sends a DHCPDISCOVER message?
255.255.255.255 (any)
Which statement describes SVIs?
A default SVI is created for VLAN 1 for switch administration.
What are two functions of a router? (Choose two.)
A router connects multiple IP networks. It determines the best path to send packets.
Which two route source codes are automatically created within a routing table whenever a router interface is configured with an IP address and activated? (Choose two.)
C L
What is the purpose of frame buffers on a switch?
They hold traffic, thus alleviating network congestion.
Which sentence correctly describes the SVI inter-VLAN routing method?
an svi is needed for each vlan
What is one function of a Layer 2 switch?
determines which interface is used to forward a frame based on the destination MAC address
Which feature on a Cisco router permits the forwarding of traffic for which there is no specific route?
gateway of last resort
Which switching method makes use of the FCS value?
store-and-forward
Which network device can be used to eliminate collisions on an Ethernet network?
switch
Which prompt is displayed when a network administrator successfully accesses the boot loader on a switch to recover from a system crash?
switch:
When configuring a switch for SSH access, what other command that is associated with the login local command is required to be entered on the switch?
username username secret secret
What is the meaning of the number 10 in the encapsulation dot1Q 10 native router subinterface command?
vlan id
What address and prefix length is used when configuring an IPv6 default static route?
::/0
A network administrator is determining the best placement of VLAN trunk links. Which two types of point-to-point connections utilize VLAN trunking? (Choose two.)
- b/w 2 switches that utilize multiple vlans - b/w a switch and server that has an 802.1Q NIC
Which router bootup sequence is correct?
1. POST and load bootstrap 2. located and load Cisco IOS software 3. locate and load startup config
Which destination IPv4 address does a DHCPv4 client use to send the initial DHCP Discover packet when the client is looking for a DHCP server?
255.255.255.255
What is required to perform router-on-a-stick inter-VLAN routing?
a router that is configured with multiple subinterfaces
A small college uses VLAN 10 for the classroom network and VLAN 20 for the office network. What is needed to enable communication between these two VLANs while using legacy inter-VLAN routing?
a router with at least 2 lan interfaces should be used
If an organization is changing to include Cisco IP phones in its network, what design feature must be considered to ensure voice quality?
a separate vlan is needed for voice traffic
What is the significant difference between a hub and a Layer 2 LAN switch?
a switch creates many smaller collision domains, and a hub increases the size of a single collision domain
