Networking Final
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? It allows only VLAN 30 on Fa0/5. It allows VLANs 1 to 30 on Fa0/5. It allows a native VLAN of 30 to be implemented on Fa0/5. It allows VLANs 10, 20, and 30 on Fa0/5.
A
A network administrator is configuring an EtherChannel link between two physical ports on a switch. Which statement describes the result when one of the physical ports fails? The EtherChannel continues transmitting data with reduced bandwidth. An STP recalculation is needed. The EtherChannel stops transmitting data until it is restarted. The EtherChannel link fails.
A
For what reason would a network administrator use the show interfaces trunk command on a switch? to view the native VLAN to examine DTP negotiation as it occurs to verify port association with a particular VLAN to display an IP address for any existing VLAN
A
In which location are the normal range VLANs stored on a Cisco switch by default? flash memory RAM running-config startup-config
A
In which memory location are the VLAN configurations of normal range VLANs stored on a Catalyst switch? flash RAM NVRAM ROM
A
What additional information is contained in the 12-bit extended system ID of a BPDU? VLAN ID IP address port ID MAC address
A
What is a disadvantage of using router-on-a-stick inter-VLAN routing? does not scale well beyond 50 VLANs requires the use of more physical interfaces than legacy inter-VLAN routing does not support VLAN-tagged packets requires the use of multiple router interfaces configured to operate as access links
A
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 configuring a switch with proper security to ensure that all traffic forwarded through an interface is filtered configuring a router with a complete MAC address database to ensure that all frames can be forwarded to the correct destination designing a network to use multiple virtual devices to ensure that all traffic uses the best path through the internetwork
A
What is required to perform router-on-a-stick inter-VLAN routing? a router that is configured with multiple subinterfaces a router with multiple physical interfaces a multilayer switch a Layer 2 switch that is configured with multiple trunk ports
A
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. A hub divides collision domains, and a switch divides broadcast domains. Each port of a hub is a collision domain, and each port of a switch is a broadcast domain. A hub forwards frames, and a switch forwards only packets.
A
What type of Ethernet cable would be used to connect one switch to another switch when neither switch supports the auto-MDIX feature? crossover straight-through rollover coaxial
A
When a range of ports is being configured for EtherChannel, which mode will configure LACP on a port only if the port receives LACP packets from another device? passive auto desirable active
A
When a range of ports is being configured for EtherChannel, which mode will configure LACP so that it initiates the EtherChannel negotiation? active auto passive desirable
A
Which command will provide information about the status of all interfaces including the number of giants, runts, and collisions on the interface? show interfaces show running-config show ip interface brief show history
A
Which is a DHCPv4 address allocation method that assigns IPv4 addresses for a limited lease period? dynamic allocation automatic allocation manual allocation pre-allocation
A
Which statement describes SVIs? A default SVI is created for VLAN 1 for switch administration. An SVI can only be created for the management VLAN. An SVI is created automatically for each VLAN on a multilayer switch. Creating an SVI automatically creates an associated VLAN.
A
Which switching method makes use of the FCS value? store-and-forward broadcast large frame buffer cut-through
A
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 DHCPOFFER DHCPDISCOVER DHCPNAK DHCPACK
A and C
What are three primary benefits of using VLANs? (Choose three.) cost reduction a reduction in the number of trunk links security end user satisfaction
A and C
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 ip interface show controllers show ip protocols show running-config show vlan
A and D
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.) between two switches that share a common VLAN between a switch and a client PC between a switch and a network printer between two switches that utilize multiple VLANs between a switch and a server that has an 802.1Q NIC
A and E
Which two mode combinations would result in the successful negotiation of an EtherChannel? (Choose two.) desirable; desirable active; on desirable; active passive; auto active; passive auto; auto
A and E
Which two statements describe a switch port that is configured with PortFast? (Choose two.) The switch port immediately transitions from blocking to the forwarding state. The switch port immediately transitions from the listening to the forwarding state. The switch port immediately processes any BPDUs before transitioning to the forwarding state. The switch port sends DHCP requests before transitioning to the forwarding state. The switch port should never receive BPDUs.
A and E
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 enable the Gi0/1 port as a switch virtual interface to make the Gi0/1 port a routed port to enable the Gi0/1 port as a bridge virtual interface to shut down the Gi0/1 port
B
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? Remove all access ports from VLAN 99. Connect a host to an interface associated with VLAN 99. Configure a transport input method on the vty lines. Configure a default gateway.
B
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? Both switches are in trunk mode. Switches from other vendors do not support DTP. Both switches are in nonegotiate mode. DTP frames are flooding the entire network.
B
On a Cisco switch, where is extended range VLAN information stored? startup configuration file running configuration file NVRAM flash
B
What does the term "port density" represent for an Ethernet switch? the speed of each port the number of available ports the memory space that is allocated to each switch port the numbers of hosts that are connected to each switch port
B
What happens to a port that is associated with VLAN 10 when the administrator deletes VLAN 10 from the switch? The port goes back to the default VLAN. The port becomes inactive. The port automatically associates itself with the native VLAN. The port creates the VLAN again.
B
What is one function of a Layer 2 switch? learns the port assigned to a host by examining the destination MAC address determines which interface is used to forward a frame based on the destination MAC address duplicates the electrical signal of each frame to every port forwards data based on logical addressing
B
What is the meaning of the number 10 in the encapsulation dot1Q 10 native router subinterface command? the subnet number the VLAN ID the interface number the subinterface number
B
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? There is a web server for public access on the LAN that is attached to the router. It is a SOHO or home broadband router. The router is configured as a DHCP server. The router is also the gateway for a LAN.
B
What is the purpose of the vlan.dat file on a switch? It holds the operating system. It holds the VLAN database. It holds the running configuration. It holds the saved configuration.
B
What operational mode should be used on a switch port to connect it to a router for router-on-a-stick inter-VLAN routing? dynamic desirable trunk access dynamic auto
B
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? Drop the frame. Forward the frame out all ports except the port where the frame is received. Use ARP to resolve the port that is related to the frame. Send the frame to the default gateway address.
B
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? blocking listening forwarding disabled
B
When a Cisco switch receives untagged frames on a 802.1Q trunk port, which VLAN ID is the traffic switched to by default? management VLAN ID native VLAN ID unused VLAN ID data VLAN ID
B
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 SVI to the subinterface to the interface to the VLAN
B
Which DHCP IPv4 message contains the following information? Destination address: 255.255.255.255Client IPv4 address: 0.0.0.0Default gateway address: 0.0.0.0Subnet mask: 0.0.0.0 DHCPREQUEST DHCPDISCOVER DHCPACK DHCPOFFER
B
Which sentence correctly describes the SVI inter-VLAN routing method? The encapsulation type must be configured on the SVI. An SVI is needed for each VLAN. Subinterfaces have to be created. A physical interface is needed for every VLAN that is created.
B
Which statement is true about EtherChannel technology? Links must be upgraded to support EtherChannel. EtherChannel uses existing switch ports. All configuration tasks must be done on the individual ports in the EtherChannel link. STP does not run on redundant EtherChannel links.
B
Under which two circumstances would a router usually be configured as a DHCPv4 client? (Choose two.) The administrator needs the router to act as a relay agent. The router is intended to be used as a SOHO gateway. The router is meant to provide IP addresses to the hosts. This is an ISP requirement. The router has a fixed IP address.
B and D
Which tasks can be accomplished by using the command history feature? (Choose two.) Recall up to 15 command lines by default. Recall previously entered commands. Save command lines in a log file for future reference. View a list of commands entered in a previous session. Set the command history buffer size.
B and E
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.) PVST+ edge port extended system ID bridge ID PortFast
B and E
Which three interface parameters must match for an EtherChannel to form? (Choose three.) EtherChannel mode allowed VLANs native VLAN trunking mode spanning-tree state PortFast mode
B, C , and D
What are three advantages of using EtherChannel technology? (Choose three.) The Spanning Tree Protocol shuts down the unused interfaces in the bundle to avoid loops. There is no need to upgrade links to faster connections to increase bandwidth. EtherChannel uses multiple logical links to provide redundancy. Load balancing is not needed with EtherChannel. Configuration tasks can be done on the EtherChannel interface. A spanning tree recalculation is not required when a single link within the channel goes down.
B, E, and F
An EtherChannel link using LACP was formed between two switches, S1 and S2. While verifying the configuration, which mode combination could be utilized on both switches? S1-on and S2-passive S1-on and S2-active S1-passive and S2-active S1-passive and S2-passive
C
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 running-config show startup-config show spanning-tree show vlan
C
As a DHCPv4 client lease is about to expire, what is the message that the client sends the DHCP server? DHCPDISCOVER DHCPOFFER DHCPREQUEST DHCPACK
C
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? Each switch with a lower root ID than its neighbor will not send BPDUs. Each switch determines what port to block to prevent a loop from occurring. All the switches send out BPDUs advertising themselves as the root bridge. Each switch determines the best path to forward traffic.
C
How is a DHCPDISCOVER transmitted on a network to reach a DHCP server? A DHCPDISCOVER message is sent with a multicast IP address that all DHCP servers listen to as the destination address. A DHCPDISCOVER message is sent with the IP address of the default gateway as the destination address. A DHCPDISCOVER message is sent with the broadcast IP address as the destination address. A DHCPDISCOVER message is sent with the IP address of the DHCP server as the destination address.
C
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? request, acknowledgment, discover, offer acknowledgment, request, offer, discover discover, offer, request, acknowledgment request, discover, offer, acknowledgment
C
What advantage does SSH offer over Telnet? username and password authentication more connection lines encryption connection-oriented services
C
What is a disadvantage of using multilayer switches for inter-VLAN routing? Multilayer switches are limited to using trunk links for Layer 3 routing. Multilayer switches have higher latency for Layer 3 routing. Multilayer switches are more expensive than router-on-a-stick implementations. Spanning tree must be disabled in order to implement routing on a multilayer switch.
C
What is the destination IP address when an IPv4 host sends a DHCPDISCOVER message? 192.168.1.1 224.0.0.1 255.255.255.255 0.0.0.0
C
What is the first action in the boot sequence when a switch is powered on? load boot loader software load the default Cisco IOS software load a power-on self-test program low-level CPU initialization
C
What is the purpose of frame buffers on a switch? They provide temporary storage of the frame checksum. They provide a basic security scan on received frames. They hold traffic, thus alleviating network congestion. They execute checksum values before transmission.
C
What is the purpose of setting the native VLAN separate from data VLANs? The security of management frames that are carried in the native VLAN can be enhanced. The native VLAN is for carrying VLAN management traffic only. A separate VLAN should be used to carry uncommon untagged frames to avoid bandwidth contention on data VLANs. The native VLAN is for routers and switches to exchange their management information, so it should be different from data VLANs.
C
What is the reason why the DHCPREQUEST message is sent as a broadcast during the DHCPv4 process? to notify other hosts not to request the same IP address for routers to fill their routing tables with this new information to notify other DHCP servers on the subnet that the IP address was leased for hosts on other subnets to receive the information
C
When a range of ports is being configured for EtherChannel by the use of PAgP, which mode will form the bundled channel only if the port receives PAgP packets from another device? passive active auto desirable
C
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? login block-for seconds attempts number within seconds password password username username secret secret enable secret password
C
Where is the vlan.dat file stored on a switch? on the externally attached storage media or internal hard drive in RAM in flash memory in NVRAM
C
Which address does a DHCPv4 server target when sending a DHCPOFFER message to a client that makes an address request? broadcast MAC address client IP address client hardware address gateway IP address
C
Which network device can be used to eliminate collisions on an Ethernet network? hub router switch firewall
C
Which option correctly describes a switching method? cut-through: makes a forwarding decision after receiving the entire frame cut-through: provides the flexibility to support any mix of Ethernet speeds store-and-forward: ensures that the frame is free of physical and data-link errors store-and-forward: forwards the frame immediately after examining its destination MAC address
C
Which prompt is displayed when a network administrator successfully accesses the boot loader on a switch to recover from a system crash? system: switch# switch: system#
C
Which statement is true about broadcast and collision domains? The more interfaces a router has the larger the resulting broadcast domain. The size of the collision domain can be reduced by adding hubs to a network. Adding a switch to a network will increase the size of the broadcast domain. Adding a router to a network will increase the size of the collision domain.
C
Which type of inter-VLAN communication design requires the configuration of multiple subinterfaces? routing for the management VLAN routing via a multilayer switch router on a stick legacy inter-VLAN routing
C
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? to provide an access link that tags VLAN traffic to provide a static trunk link to create a routed port for a single network to create a switched virtual interface
C
Which two statements are true about half-duplex and full-duplex communications? (Choose two.) Half duplex has only one channel. Full duplex offers 100 percent potential use of the bandwidth. Full duplex increases the effective bandwidth. Full duplex allows both ends to transmit and receive simultaneously. All modern NICs support both half-duplex and full-duplex communication.
C and D
Which three port states are used by Rapid PVST+? (Choose three.) listening blocking learning trunking discarding forwarding
C, D, and F
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? router on a stick multiple physical interfaces on the router, all connected to a Layer 2 switch trunked interface between the router and the switch multilayer switch with routing enabled
D
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? Two groups of switches are needed, each with ports that are configured for one VLAN. A router with one VLAN interface is needed to connect to the SVI on a switch. A switch with a port that is configured as trunk is needed to connect to a router. A router with at least two LAN interfaces should be used.
D
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 the hops to reach the root and use the path with the fewest hops. Each switch will analyze the port states of all neighbors and use the designated ports to forward traffic to the root. Each switch will analyze the BID of all neighbors to reach the root and use the path through the lowest BID neighbors. Each switch will analyze the sum of all port costs to reach the root and use the path with the lowest cost.
D
An administrator issues the commands: Router(config)# interface g0/1Router(config-if)# ip address dhcp What is the administrator trying to achieve? configuring the router to act as a DHCPv4 server configuring the router to resolve IP address conflicts configuring the router to act as a relay agent configuring the router to obtain IP parameters from a DHCPv4 server
D
How is traffic routed between multiple VLANs on a multilayer switch? Traffic is routed via subinterfaces. Traffic is broadcast out all physical interfaces. Traffic is routed via physical interfaces. Traffic is routed via internal VLAN interfaces.
D
If an organization is changing to include Cisco IP phones in its network, what design feature must be considered to ensure voice quality? Voice traffic and data traffic require separate trunk links between switches. Additional switch ports that are dedicated to Cisco IP phones are required. Voice traffic needs to be tagged with the native VLAN. A separate VLAN is needed for voice traffic.
D
What is one way to correct a spanning tree failure? Replace all instances of STP with RSTP. Insert redundant links to replace the failed STP links. Replace the cables on failed STP links. Manually remove redundant links in the switched network.
D
What kind of message is sent by a DHCPv4 client requesting an IP address? DHCPACK unicast message DHCPDISCOVER unicast message DHCPOFFER unicast message DHCPDISCOVER broadcast message
D
What must an administrator have in order to reset a lost password on a router? a crossover cable a TFTP server access to another router physical access to the router
D
What value determines the root bridge when all switches connected by trunk links have default STP configurations? VLAN ID extended system ID bridge priority MAC address
D
When EtherChannel is implemented, multiple physical interfaces are bundled into which type of logical connection? VLAN interface interface range loopback port channel
D
When a client is requesting an initial address lease from a DHCP server, why is the DHCPREQUEST message sent as a broadcast? The client does not yet know the IP address of the DHCP server that sent the offer. The client does not have a MAC address assigned yet, so it cannot send a unicast message at Layer 2. The DHCP server may be on a different subnet, so the request must be sent as a broadcast. The client may have received offers from multiple servers, and the broadcast serves to implicitly decline those other offers.
D
When a range of ports is being configured for EtherChannel, which mode will configure PAgP so that it initiates the EtherChannel negotiation? active auto passive desirable
D
Which STP port role is adopted by a switch port if there is no other port with a lower cost to the root bridge? disabled port alternate designated port root port
D
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? 127.0.0.1 224.0.0.1 the IP address of the default gateway 255.255.255.255
D
Which distinct type of VLAN is used by an administrator to access and configure a switch? default VLAN data VLAN native VLAN management VLAN
D
Which function is provided by EtherChannel? dividing the bandwidth of a single link into separate time slots enabling traffic from multiple VLANs to travel over a single Layer 2 link spreading traffic across multiple physical WAN links creating one logical link by using multiple physical links between two LAN switches
D
Which is the default STP operation mode on Cisco Catalyst switches? MST RSTP MSTP PVST+ Rapid PVST+
D
Which network device can serve as a boundary to divide a Layer 2 broadcast domain? Ethernet hub Ethernet bridge access point router
D
Which port state will switch ports immediately transition to when configured for PortFast? learning listening blocking forwarding
D
Which router bootup sequence is correct? 1 - perform the POST and load the Cisco IOS software 2 - locate and load the startup configuration file or enter setup mode 3 - locate and load the bootstrap program 1 - perform the POST and load the startup configuration file 2 - locate and load the bootstrap program 3 - locate and load the Cisco IOS software 1 - perform the POST and load the bootstrap program 2 - locate and load the startup configuration file or enter setup mode 3 - locate and load the Cisco IOS software 1 - perform the POST and load the bootstrap program 2 - locate and load the Cisco IOS software 3 - locate and load the startup configuration file or enter setup mode
D
Which scalable method must be implemented in order to provide inter-VLAN routing on a switched network with more than 1000 VLANs? connecting a router interface to a switch port that is configured in trunk mode to route packets between VLANs, with each VLAN assigned to a router subinterface connecting each physical router interface to a different physical switch port, with each switch port assigned to a different VLAN configuring static routes on a Layer 2 switch device routing traffic internally to a Layer 3 switch device
D
Which statement describes the system LED operation on Cisco Catalyst switches? If the LED is blinking green, the system is operating normally. If the LED is amber, the system is not powered on. If the LED is blinking amber, the switch is performing POST. If the LED is amber, the system is receiving power but it is not functioning properly.
D
Which switch characteristic helps alleviate network congestion when a 10 Gbps port is forwarding data to a 1 Gbps port? fast port speed fast internal switching high port density frame buffering
D
Which type of address does a switch use to build the MAC address table? destination IP address source IP address destination MAC address source MAC address
D
Which two load balancing methods can be implemented with EtherChannel technology? (Choose two.) destination IP to destination MAC destination IP to source IP destination MAC to destination IP source MAC to destination MAC source IP to destination IP destination MAC to source MAC
D and E
Which two protocols are link aggregation protocols? (Choose two.) EtherChannel STP RSTP PAgP 802.3ad
D and E
What will happen if a network administrator puts a port that is part of an EtherChannel bundle into a different VLAN than the other ports in that bundle? The EtherChannel bundle will stay up if either PAgP or LACP is used. The EtherChannel bundle will stay up only if PAgP is used. The EtherChannel bundle will stay up only if LACP is used. The EtherChannel bundle will stay up if the ports were configured with no negotiation between the switches to form the EtherChannel. The EtherChannel will fail.
E
Which information does a switch use to keep the MAC address table information current? the source and destination MAC addresses and the incoming port the destination MAC address and the outgoing port the source MAC address and the outgoing port the source and destination MAC addresses and the outgoing port the destination MAC address and the incoming port the source MAC address and the incoming port
F