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CCIE Theory

CCIE Theory questions to know for test

TermDefinition
BPDU protocol version for 802.1W 2
Which three ports are used by 802.1W 1 learning 2 forwarding 3 Discarding
What is the STP root Guard feature designed to prevent? Port being assigned as a root port
Which are three combinations that are valid PAgP configurations that will setup a channel? 1 ON-ON 2 Desirable-Auto 3 Desirable-Desirable
What is the most likely reason an OSPF point-to-point link is not forming adjacency? Each interface has a different size MTU.
Three options used in the Spanning-tree decision process? 1 Lowest root bridge ID 2 Lowest path cost to root bridge 3 Lowest sender bridge ID
Which three options are valid ways to filter routes from a BGP peer? 1 Filter-list 2 Route-map 3 Prefix-list
Feature prevents guest from unplugging IP phone and connecting a laptop Port Security with statically configured MAC addresses
Problem:Election of a new root bridge with unknown MAC address. Enable bpduguard globally
What are the "bound IP addresses" used for in LDP? These addresses are used to find the label binding in put in the LFIB by looking up these IP addresses in the routing table.
When troubleshooting duplex mismatches, which two are errors that are seen on the half duplex end? 1 excessive 2 late collisions
Which two statements are true about traffic shaping? 1 Out-of-profile packets are queued 2 Marking/remarking is not supported
In an 802.1s BPDU, what is the size of the configuration revision number? 16 bits
What standard supports multiple instances of spanning tree? 802.1s
Which three combinations are valid PAgP or static configurations the will set up a channel? 1 On-On 2 Desirable-Auto 3 Desirable-desorable
What are two ways to force the selection of a root bridge in a network the is running the 802.1D protocol? 1 Spanning-tree vlan vlan-id root 2 Spanning-tree vlan vlan-id priority 0
What are the port roles described by 802.1W root port,designated port, alternate port, backup port, and disabled
spanning tree protocol calculates path cost on? interface bandwidth
How many bytes make up the spanning-tree bridge ID? 8
When troubleshooting duplex mismatches, which two are errors that are seen on the half duplex end? 1 excessive collisions 2 late collisions
Which two statements describe spanning-tree BPDU processing for a blocking port? 1 BPDUs that enter a blocking port are processed 2 Loopguard puts an interface in a loop-inconsistent state when BPDU's stop being received on a blocking port.
Where should Frame-relay traffic shaping be applied? on the physical interface
Three that are true about cisco Spanning-tree features. 1 STP bpdu's are relayed by all non-root bridges an RSTP bpdu's are generated by each bridge. 2 RSTP can only achieve rapid transition to forwarding on edge ports and on point-to-point links. 3 RPVST+ and RSTP based upon 802.1w specification .
In Frame relay, FECN messages indicationg congestion are sent or received by which of the following? Received by the destination.
Three ports used by RSTP 802.1W? 1 learning 2 Forwarding 3 Discarding
In which two ways does loop guard differ from UDLD in loop detraction and prevention? 1 UDLD protects against STP failures caused by cabling problems that create one-way links. 2 Loop guard protects against STP failures caused by problems that result in the loss of BPDU's from a designed switch port.
Under which two circumstances would an RSTP bridge flush its CAM table? 1 Upon receiving a topology change notification 2 When transitioning from discarding to forwarding
What two statements are true about LACP? 1 LACP packets are sent with multicast group MAC address 01-80-c2-00-00-02 2 During detection LACP packets are transmitted every second
What statement is true about TCN propagation in RSTP (802.1W)? The originator of the TCN immediately floods this information through the network.
If a port with STP loop guard stops receiving BPDUs, the port will be put into which state? Loop-inconsistent state
Which switch port error is an indication of duplex mismatches on 10/100/1000 IEEE 802.3u Gigabit Ethernet ports? Multiple collisions
Which three options are features of VTP version 3? 1 VTPv3 supports private VLAN mapping 2 VTPv3 uses a primary server concept to avoid configuration revision issues 3 VTPv3 has a hidden password option
Which two are contained in a VTP summary advertisement? 1 Configuration revision number 2 VTP domain name
Which two combinations are valid LACP configurations that will set up an LACP channel? 1 Passive-active 2 active-active
802.1Q trunk is not coming up between two switches. No physical issues. What are two possible causes? 1 Incorrect VTP domain. 2 Incorrect VTP password.
Trying to add a switch. 802.1 Q not coming up. In the lab it worked fine. Three possible causes? 1 The trunking configuration mode on switch 1 is set to off 2 There is a VTP domain name mismatch 3 Switch 1 does not support 802.1 Q
Which three combinations are valid LACP configurations that will set up a channel? 1 On-on 2 Passive-Active 3 Active-Active
Mathematical relationship between the committed information rate(CIR), Committed Burst,(Bc) and Committed rate measurement interval (Tc)? Tc=Bc/CIR
When using extended system ID in 802.1d, how many bits are reserved for the field? 12
Two used in the selection of a root bridge in a Spanning Tree Protocol IEEE 802.1 D? 1 Bridge ID priority 2 Bridge ID MAC address
Which two options are contained in a VTP subnet advertisement? 1 VLAN information 2 Sequence number
Which two statements are true about 802.1s? 1 802.1s supports number spanning-tree instances? 2 The CPU utilization for 802.1s is lower than the CPU utilization for 802.1w
In 802.1s, how is the VLAN to instance mapping represented in the BPDU? The VLAN to instance mapping is a 16-byte MD5 signature field in the MST BPDU.
Which two combinations are valid PAgP configurations that will set up a PAgP channel? 1 Desirable-Auto 2 Desirable-Desirable
Admin wants to enable Etherchannel between two switches in the "on" mode. How can he avoid a problem? 1 Configure the Etherchannel as "desirable" first 2 Disable all interfaces first
Which two statements are true about the role of split horizon? 1 It is a function that prevents the adverting of routes over the interface that the router is using to reach a route. 2 Its function is to help avoid routing loops
Two bridges competing for root bridge of a 802.1D Spanning tree. Both have the same bridge priority. Which one wins? MAC address
What does the "root guard" feature provide in a bridged network? It enforces the root bridge placement in the network.
What are the port roles described by 802.1w? Root port ,designated port, alternate port, backup port, and disabled.
Which statement is true about shaping? Shaping supports queuing of excess traffic
You are configuring an 802.1Q trunk between a layer 2 switch and a firewall. documentation says dynamic desirable. does not function. The firewall does not support DTP. You should set the switchport trunk mode to ON.
If a Cisco switch is configured with VTPv1 in transparent mode, what is done with received VTP advertisements? The contents are ignored and they are forwarded out all trunking ports.
What is the purpose of the STP Portfast BPDU guard feature? Enforce the borders of an STP domain.
Which three of these statements about Dynamic Trunking protocol are correct? 1 It supports autonegotiation for both ISL and 802.1Q trunks 2 It must be disabled on an interface if you do not want the interface to work as a trunk or start negotiation to become a trunk 3 It is a point-to-point protocol
Which two statements describe spanning-tree BPDU processing for a blocking port? 1 BPDUs that enter a blocking port are processed 2 Loopguard puts an interface into a loop-inconsistent state when BPDUs stop being received on a blocking port.
Which statement is true about TCN propagation? A TCN is generated and sent to the root bridge.
The classic Spanning-tree Protocol(802.1D 1998) uses which sequence of variables t determine the best received BPDU? 1)Lowest root bridge ID, 2)Lowest root path ID, 3)Lowest sender bridge ID, 4) Lowest sender port ID
Which configuration is used to enable root guard? interface gig3/1 spanning-tree guard root
When STP UplinkFast is enabled on a switch utilizing the default bridge priority, what will the new bridge priority be changed to? 49152
On what type of ports would STP Port Fast BPDU guard be most appropriate? Host ports
Prior to 802.1w, Cisco implemented a number of proprietary enhancements to 802.1D to improve convergence in a layer 2 network. Which statement is correct? Portfast, UplinkFast, and BackboneFast are specified in 802.1w
Your network is suffering from regular outages. After troubleshooting, you learn that the transmit lead of a fiber uplink was damaged. Prevent in the future. 1 loopguard 2 UDLD
which three can be achieved by Cisco PVST+? 1 Load balancing 2 Backbone, Uplink and portfast 3 root, loop and BPDU guard
Your Network is very slow. Your CAM table is full. 12000 MAC address Prevent this from Happening Configure Port security.
What statement is true about TCN propagation in RSTP(802.1w) The originator of the TCN immediately through the network.
Which load-balance algorithm can you use in the switch in order to optimize this load balancing? 1 source IP address 2 Destination IP address 3 destination MAC address 4 Source MAC address
Which three are true about cisco Spanning-tree features? 1 STP BPDUs are relayed by all non-root bridges and RSTP BPDUs are generated by each bridge 2 RSTP can only achieve rapid transition to forwarding on edge ports and on point-to-point kinks 3 RPVST+ and RSTP are both based upon the IEEE 802.1ww specs
What two statement are true about PAgP? 1 PAgP uses the same multicast group MAC address as Cisco Discovery Protocol 2 The PAgP protocol value is 0x0104
Under which two circumstances would an RSTP bridge flush it's CAM table? 1 upon receiving a topology change notification 2 when transitioning from discarding to forwarding
Which command is used to enable EtherChannel hashing for layer 3 IP and Layer 4 port-based CEF? Port-channel load balance
Which of these correctly identifies a difference between the way BPDUs are handled by 802.1 w and 802.1 D? 802.1D bridges only rely BPDUs received from the root.
Which two solutions would allow for more bandwidth for an application? 1 Have the application recoded to use multiple connections instead of a single connection so EtherChannel can better load balance the traffic 2 Upgrade the Etherchannel bundle to a single gigabit link.
Which statement is true about loop guard? Loop guard only operates on interfaces that are considered point-to-point by the spanning tree
Admin followed the correct procedure. What would be a possible cause of a problem? Erasing VLAN's increases the VTP configuration revision.
For the following ports, which port is on every bridge in a Spanning tree Protocol IEEE 802.1w network except the root bridge? root port
Which two attributes need to match for two switches to become members of the same MST region? 1 The table of 4096 elements that map the respective VLAN to STP instance number 2 Configuration revision number
For the following LMI types, which three can be configured for use with Frame Relay on a Cisco router? 1 Cisco 2 Ansi-Annex D 3 Q9330Annex A
Which two are natively included bt the IEEE 802.1w Standard? 1 fast transition to forwarding state. 2 Backbone,uplink and portfast
In which two spanning-tree states is the port learning MAC addresses? 1 learning 2 forwarding
Each location has only one physical link to the cloud. No connection between B and C. Use Frame-relay IETF encapsulation on a per-VC basis on the central office router.
Which of these statements regarding port states is true of both 802.1D and 802.1w The 802.1 D port states Disabled, Blocking and listening have become the 802.1w port states and all other 802,1D port states remain the same in 802.1w
Which of these best describes the action taken when VTP message is received on a switch in VTP mode Transparent? VTP updates are ignored and forwarded out trunks only
Phase I and Phase II DMVPN differ in terms of which characteristics? Utilization of spoke-to-spoke dynamic tunnels
why does RSTP have a better convergence time than 802.1 D? it is not timer-based
A user has no network connectivity. A check of the associated ports indicates that the interface is up, the line protocol is down. Which item would most likely cause problem? Speed Mismatch
If a port configured with STP loop guard stops receiving BPDUs, the port will be put into which state? loop-inconsistent state.
In layer 2 topologies, Spanning-tree failures can cause loops in the network. These unblocked loops can cause network failures because of excessive traffic. Two features used to limit. 1 storm control 2 Broadcast suppression
Created by: 100000429226399