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94 Cards in this Set
- Front
- Back
Which type of router allows users to access content anytime and anyplace, regardless of whether they are at home or work?
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network edge routers
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How much traffic is a 48-port gigabit switch capable of switching when operating at full wire speed?
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48 Gb/s
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Provides a high-speed backbone link btween dispersed networks
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Core Layer
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Forwards traffic from one local network to another
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Distribution Layer
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Provides connectivity for users
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Access Layer
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Combines multiple physical links into a single logical link
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Ether Channel
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What is a characteristic of out-of-band device management?
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It requires a terminal emulation client
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What are two features modern enterprise networks are expected to support?
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Critical applications
Converged network traffic |
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Among the beneficial functions of a router are enhanced network security and containment of _____ traffic.
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broadcast
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Which network design solution will best extend access layer connectivity to host devices?
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Wireless connectivity
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Which two methods help to prevent the disruption of network services?
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Duplicate equipment to provide failover services
Redundant connections to provide alternate physical paths |
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The number of ports available on a single switch is referred to as _____ _______.
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port density
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Which two issues are the result of a broadcast storm?
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Due to high processing demands, communication may fail between end stations in the broadcast domain.
Constant changes to the MAC address table prevent a switch from accurately forwarding frames. |
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Which port state receives BPDU frames, but does not forward ANY frames?
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Blocking
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Which port state can participate in BPDU frame forwarding based on BPDUs received, but does not forward data frames?
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Listening
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Which port state learns MAC addresses, but does not forward data frames?
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Learning
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Which port state forwards data frames and sends and receives BPDU frames?
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Forwarding
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Which port state does not participate in spanning tree and does not forward frames?
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Disabled
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Which port state is set when the switch port is administratively disabled?
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Disabled
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Default priority value
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32768
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What is one way to correct a spanning tree failure?
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Manually remove redundant links in the switched network.
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What is the first step of the spanning-tree election process?
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All the switches send out BPDUs advertising themselves as the root bridge.
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Which five port states are used by PVST+
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Blocking
Listening Learning Forwarding Disabled |
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Which three port states are used by Rapid PVST+?
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Discarding
Learning Forwarding |
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Using multiple paths between switches to ensure there is no single point of failure is an example of __________.
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Redundancy
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Used within a group of routers for selecting an active device and a standby device to provide gateway services to a LAN.
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HSRP
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Cisco enhancement of RSTP to provide a spanning-tree instance for each VLAN
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Rapid PVST+
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Legacy standard for STP that runs all VLANs in a single spanning-tree instance
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STP
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Allows multiple VLANs to run in a single spanning-tree instance
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MSTP
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Cisco enhancement of STP that provides a separate spanning-tree instance for each VLAN
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PVST+
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Updated version of the STP standard, incorporating IEEE 802.1w
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802.1D-2004
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Evolution of STP that provides faster convergence than STP
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RSTP
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Routes traffic destined to network segments beyond the source network segment for which the sending node may not have explicit routing info
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Default Gateway
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A set of routers working together appearing as a single router to hosts on a LAN segment
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Virtual Router
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Layer 3 address assigned to a protocol that shares the single address among multiple devices
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Virtual IP Address
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A device that is part of a virtual router group assigned to alternate default gateway
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Standby Router
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Layer 2 address returned by ARP for an FHRP gateway
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Virtual MAC Address
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Device that is part of a virtual router group assigned to default gateway
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Forwarding Router
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Cisco-proprietary FHRP designed to allow for transparent failover of a first-hop IPv4 device
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HSRP
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Used in a group of routers for selecting an active and a standby device
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HSRP
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Non-proprietary election protocol that allows several routers to utilize the same vitual IPv4 address
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VRRP
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One router is elected as the virtual master, with the other routers acting as backups in case the primary virtual router fails
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VRRP
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Cisco-proprietary FHRP that protects data traffic from a failed router or circuit while also allowing load balancing between a group of redundant routers
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GLBP
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Allows IPv4 hosts to locate routers that provide IPv4 connectivity to other (nonlocal) IP networks
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IRDP
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Provide alternate default gateways for hosts in the redundant router or multilayer switched environment
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FHRP
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Sends BPDU frames for communication between switches
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STP
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What command can verify if a switch is a root bridge. What command can be used to do this?
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show spanning-tree
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Which two FHRP protocols will not be able to function with multivendor devices?
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HSRP
GLBP |
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The switch port immediately transitions from blocking to the forwarding state.
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PortFast
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T/F: A switch port with PortFast configured can receive BPDUs.
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False
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With FHRP, which two items will be shared by a set of routers appearing as a single router?
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IP address
MAC address |
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After the election of the root bridge has been completed, how will switches find the best paths to the root bridge?
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Each switch will analyze the sum of all port costs to reach the root and use the path with the lowest cost.
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Cisco-proprietary protocol that aids in the automatic creation of EtherChannel links
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PAgP
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IEEE standard that can be used to facilitate EtherChannels in multivendor environments
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LACP
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Places an interface in a passive, responding state. Does not initiate PAgP negotiations
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Auto
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Initiates LACP negotiations with other interfaces
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Active
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Actively initiates PAgP negotiations with other interfaces
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Desirable
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Forces EtherChannel state without PAgP or LACP initiated negotiations
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On
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Places an interface in a passive, responding state. Does not initiate LACP negotiations
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Passive
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PAgP modes
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On
Desirable Auto |
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LACP modes
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On
Active Passive |
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Which three parameters must match, on the ports of two switches, for a PAgP Etherchannel to be created?
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Speed
Duplex VLAN |
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The command Switch (config-if-range)#__________ 1 mode active creates an interface port channel 1 on a switch.
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channel-group
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EtherChannel link can be configured for trunk or access mode.
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True
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T/F: When one of the physical ports in the Ether Channel fails, the channel continues transmitting data with reduced bandwidth
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True
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Which mode will configure PAgP so that it initiates the EtherChannel negotiation?
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desirable
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T/F: An EtherChannel link can only be formed by grouping interfaces of the same type.
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True
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T/F: An EtherChannel link can only be created between Layer 3 switches.
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False
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Which command displays only one line of information per port channel?
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show etherchannel summary
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If Switch1 is in auto mode, which mode should be configured on Switch2 to form the EtherChannel?
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desirable
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Which two protocols are used to implement EtherChannel?
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Port Aggregation Protocol
Link Aggregation Control Protocol |
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T/F: EtherChannel uses existing switch ports.
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True
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T/F: STP does not run on redundant EtherChannel links.
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False
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T/F: All configuration tasks must be done on the individual ports in the EtherChannel link.
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False
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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?
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The Ether Channel will fail.
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What are three advantages of using EtherChannel technology?
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Configuration tasks can be done on the EtherChannel interface.
There is no need to upgrade links to faster connections to increase bandwidth. A spanning tree recalculation is not required when a single link within the channel goes down. |
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Which three interface parameters must match for an EtherChannel to form?
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allowed VLANs
native VLAN trunking mode |
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A rogue AP is capturing traffic and then forwarding it on to the legitimate AP. This type of attack is known as a ___-__-___-______ attack.
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man in the middle
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What is a characteristic of a Yagi antenna that is used by Cisco Aironet Access Points?
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It can be used for long-distance Wi-Fi networking
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Wi-Fi antennas referred as a "rubber duck" design and provide 360-degree coverage.
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Omnidirectional
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Clients are using 802.11n and 802.11g radios on An IEEE 802.11n mixed-mode network. The 802.11n clients are complaining of slower than normal speeds. What is the problem?
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This is the normal behavior of a mixed-mode network.
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What type of frames are used for advertising, authenticating, and associating with a wireless AP?
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Management
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What Wi-Fi management frame is regularly broadcast by APs to announce their presence?
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Beacon
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If an administrator is troubleshooting a WLAN using a bottom up approach, which action would be taken first?
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Make sure all devices are powered
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Two recommendations to follow when planning the location of multiple APs?
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Position APs in locations where users are expected to be.
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Provides network access within a distance of up to 300 meters
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Wi-Fi
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Uses device pairing to communicate up to 100 meters
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Bluetooth
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Useful in remote areas, but requires a clear line of sight
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Satellite Broadband
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Alternative to Cable and DSL that can communicate up to 50km
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WiMAX
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All employees must use the microwave ovens located in the employee cafeteria and cannot have microwaves in their offices. What wireless security risk is the company trying to avoid?
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Accidental Interference
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Which combination of WLAN authentication and encryption is recommended as a best practice for home users?
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WPA2 and AES
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Known as "WiGig", the IEEE 802.11 __ standard provides average speeds of up to 7 Gb/s, but will switch to a lower GHz band when roaming is employed.
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ad
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Involves several BSSs that are joined through a common distribution system.
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ESS
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Which wireless RF band do IEEE 802.11b/g devices use?
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2.4 GHz
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