Test your basic knowledge |

CCNP Switch Deck

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. How do you disable DTP when you configure both ends of the ISL manually?
Switchpotrt nonegotiate
Best effort delivery - integrated services model - and differentiated services model
Connects to a host on an isolated or community vlan. Communicates only with promiscuous port or ports on same community vlan
Trusted or untrusted

2. What does the switchport host macro do?
Prevents the dhcp binding DB from being checked.
Via an 802.1Q trunk or a single VLAN access port
Sets the switchport mode to access - enables portfast - and turns off channel grouping for the port
Causes switch to actively determine whether alternative paths exist to root bridge in case ther eis an indirect failure

3. How is a WLC handoff handled when the WLCs are in different subnets?
By using an Ether-IP tunnel
Round robin - weighted - or host-dependent
The point at which a switch decides to trust incoming Qos. Usually at boundary with ISP
A TCN BDPU is sent out of the switch's root port. The switch will continue sending TCN's every hello interval until ack'd by upstream neighbor. The root bridge will send a Config BDPU to all switches

4. How should backbonefast be configured?
On all switches in network to enable RLQ request and reply
No
Show standby
By brining up a tunnel between them to carry 802.11 related messages and client data.

5. What is a baby giant frame?
Every hello interval regardless of whether BDPUs are received from root - allowing any switch to take an active role maintaining the topology
Frames that barely exceed 1518B or 1622B due to headers
All nondesignated ports - but ok for all ports
Port with redundant - but less deisrable connection to a segment. Possibly root candidate

6. Does VTP pass private VLAN configuration?
Option 43
The DCF interframe space- the random backoff time before a wireless set can transmit
No
Very high L3 throughput - no access lists or port filtering - redundancy and resilience - advanced QoS

7. What are the two private vlan association modes?
Stateful switchover - redundant sup is fully booted and init'd. Both start and run config are synched as is L2 information - and switchinterfaces.
Promiscuous and host
A group of wireless devices that share a common SSID
Data and voice over native vlan - no QOS but still uses 802.1p trunk

8. How can BDPU Guard be configured?
If a unidirectional link is detected - the switch doesn't try to reestablish the link. ULD msgs are sent once/sec for 8 seconds - then the port is err-disabled
If three are missed in a row - the neighbor is considered down and the data for that neighbor is aged
Compatible with 802.11b - up to 54Mbps in 12 data rates - 3 channels - 2.4Ghz
Globally or per-port

9. What is the cost of a 1Gbps link?
The station must wait until the frame in progress has completed - then wait a random amount of time before transmitting
Switches make an effort to move packets as quickly as possible
4
Sends special layer 2 UDLD frames and expects an echo. Both ends must be configured for UDLD

10. What are the RSTP port states?
Differentiated services code point
Discarding - learning - forwarding
0-255
Port with alternative path to root less desirable than root

11. How is a QoS trust bondary configured?
On root - because the root bridge propagates timers with config BDPU
Every switch and router in a network must be configured with appropriate QoS features and policies
The link status stays up - but something between them has failed or is filtering traffic
10-15%

12. What address does HSRP send hello packets to?
If three are missed in a row - the neighbor is considered down and the data for that neighbor is aged
26-byte header - 4-byte trailer with CRC
Hold time is 3xhello. A skew time of 256ms-routerpriority)/256ms is added
224.0.0.2 (all routers)

13. What are the PAgP negotiation modes
On (all ports channel) - auto (channels when asked) - and desirable(actively asks to form a channel)
Only for trusted Cisco gear - especially phones
Critical...used most often for IPT
The DCF interframe space- the random backoff time before a wireless set can transmit

14. What routing protocols support NSF?
Host Standby Router protocol. Cisco proprietary. Switch is either active - standby - or listen
They are locally significant on an interface. HSRP1 on one VLAN is different from HSRP1 on another
BGP - EIGRP - OSPF - and IS-IS.
12 kbps with headers and compression

15. What is the default FE duplex?
No
Routers at the distribution layer become the bottlenecks or broadcast or multicast traffic slows the switches in the switch block
Change in trunk encap
Full duplex

16. What is the 80/20 rule?
Global config (vlan - vtp mode - and vtp domain) and VLAN DB mode commands. Global config is preferred because VLAN DB mode commands are legacy
80% of the user traffic should stay in the VLAN
Virtual Router Redundancy Protocol - pretty much the same as HSRP
1-name the chain - 2-establish a key number - 3-create the key string - 4-apply the chain to the string

17. What pins does FE use?
Sends special layer 2 UDLD frames and expects an echo. Both ends must be configured for UDLD
The port is forced to always authorize any connected client with no authentication necessary (default)
1/2 and 3/6
The TOS field in the header is used. 2 methods 3 bits or 6 bits

18. What does a LAP do if it loses communication with it's WLC?
Reboots and searches for a new WLC
Trunk
No because they only participate if asked
Matching SSID - compatible data rate - authentication credentials

19. What is the distribution layer best practice?
Sends a voltage across the receive pairs to detect a 25k ohm resistance
The distribution layer should have only L3 links
Forces the router to wait for a period of time before attempting overthrow
Trusted or untrusted

20. What must be supported for port-based security to occur?
The switch adds its MAC to the option 82 field so that the DHCP reply echoes back the switch's own information
Access or trunk
802.1x with EAP over LAN (EAPOL)
Missed beacons - dropped packets (max retry) - weak signal (data rate switches down) - an AP periodicallytries to find a stronger signal

21. How does adding option-82 to DHCP snooping affect things?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

22. What is an ESS?
Globally or per-port
1-enable AAA on switch - 2-define RADIUS servers - 3-define authentication method - 4-enable 802.1x on switch - 5-conf. 802.1x ports - 6-allow hosts
When the AP uplinks to an Ethernet network.
Routers are assigned to common GLBP group. All routers can be active and can load balance

23. How does RSTP converge?
1 -2 -5.5 and 11 Mbps - Channels 1/6/11 - 2.4Ghz
Those that connect to other switches
If a proposal is received - the recipient isolates - all nonedge ports blocked until proposal sent causing neighbors to synch - which propagates out in waves
A port can only forward or relay BDPUs - but can't receive them - disabled by default - enabled per-port - blocks port when superior BDPUs are received

24. How do Cisco IP phones communicate with the CCM?
Switch(config-if)# vrrp xx where xx= group number
Packets are discarded due to an ACL or policy action
1- enable MST - 2-enter MST config mode - 3-assign region name and region configuration rev - 4-map vlans to an MSTI - 5-show pending changes - 6- commit by exiting
With the skinny protocol

25. At what layer does EAPOL run?
A point to point port type
Once the CCM gives them the parameters - they use RTP
Routers at the distribution layer become the bottlenecks or broadcast or multicast traffic slows the switches in the switch block
L2

26. How does a Cisco IP phone connect upstream?
The station can transmit immediately and wait for an ack
Via an 802.1Q trunk or a single VLAN access port
They must be carried over a voice VLAN (VVID) or over a regular data VLAN (ie. The native VLAN or the PVID)
63 kbps

27. What are the 2 types of BDPU?
Configuration and TCN
By an ARP access list that defines the permitted bindings
2
134 bits

28. How do you show HSRP status
Show standby
The time that a port spends in both listening and learning states . Default 15 seconds
802.1x with EAP over LAN (EAPOL)
0-255

29. What ILP mode are all ports in by default?
Globally
CEF is distributed across multiple L3 forwarding engines - typically on Catalyst 6500 line cards each having only a subset
The station must wait until the frame in progress has completed - then wait a random amount of time before transmitting
Auto mode

30. 802.11a
Causes switch to actively determine whether alternative paths exist to root bridge in case ther eis an indirect failure
Automatically by duplex mode in use. Full duplex are point ot point. Half duplex ports use traditional 802.1D convergence is used.
Up to 54Mbps - not cross-compatible - 12 to 23 clean channels - 5.8 Ghz
The port will operate under 802.1D rules. If they are received on the same port - it will run 802.1D until the migration delay expires

31. What is a direct topology change?
Each network device handles packets individually with no advance reservations
Will trunk if asked
Data and voice over native vlan - no QOS but still uses 802.1p trunk
One that can be detected on a switch interface (ie. Up/down)

32. What is the default 10mbps Enet duplex?
Half because transmitting and receiving stations use the same frequency
The number of STP instances needed ot support the desired topologies and whether to map a set of VLANs to each instance
Half-duplex
On (all ports channel) - auto (channels when asked) - and desirable(actively asks to form a channel)

33. What are the RSTP port roles?
Disabled - init - listen - speak - standby - active
Root - designated - alternate - and backup
Disabled - blocking - listening - learning - forwarding
Trunk

34. What is dynamic auto?
Will trunk if asked
Port is forced to never authorize any connected client
Disabled - init - listen - speak - standby - active
Flash (class 3)

35. What is the acceptible range of VLANS?
A host port goes up or down
1-1005 (1 and 1002-1005 are reserved)
Port stays up - packets from violating MACs dropped - no logging
VTP server for domain null with no password or secure mode

36. What is common spanning tree (CST)?
Src-ip - dst-ip - src-dst-ip - src-mac - dst-mac - src-dst-mac - src-port - dst-port - src-dst-port
When each AP stands alone within the larger network.
Single instance of STP for all VLANs. BDPUs are sent over trunks using the native VLAN with untagged frames. Dot1q based
TCAM

37. What are the 3 trunk switchport modes?
Trunk - dynamic auto - dynamic desireable (default)
All L2 connectivity should be contained within the access layer.
Half-duplex
The port asks the other end to trunk

38. How does HSRP plain text authentication work?
A key string of up to 8 characters is sent. Default is cisco.
Only on ports that have same static VLANs or trunking. It also modifies parameters of the channel if one of the ports is modified
802.1D
1500B

39. What is the access layer best practice?
Global config (vlan - vtp mode - and vtp domain) and VLAN DB mode commands. Global config is preferred because VLAN DB mode commands are legacy
The time that a port spends in both listening and learning states . Default 15 seconds
Connects with SONET or SDH
All L2 connectivity should be contained within the access layer.

40. At what layer should the WLC be connected?
Distribution
They should be an unconditional Etherchannel because the WLC can't negotiate a channel.
Cisco recommends only on the root bridge
1-lowest root bridge ID - 2-lowest root path cost - 3-lowest bridgeID - 4-lowest port ID

41. How does loop guard block ports?
The RP listens to a flow's 1st packet for the dest. The SE listens to the packet and dest and puts a shortcut in the MSL cache. Netflow switching - route once - switch many
By an ARP access list that defines the permitted bindings
Only for the offending VLAN on the port
Limits the number if dhcp requests on a port

42. What are 2 ways to configure VLAN and VTP information?
Global config (vlan - vtp mode - and vtp domain) and VLAN DB mode commands. Global config is preferred because VLAN DB mode commands are legacy
On (all ports channel) - auto (channels when asked) - and desirable(actively asks to form a channel)
Effectively stops STP on filtered ports
Those that connect to other switches

43. What are the 2 choices for VLANs with IPT?
After forwarding delay - port can learn new MAC addresses
0007.b4xx.xxyy where xx.xx is six 0 bits followed by a 10-bit GLBP group numberr. Yyyy is the virtual forwarder number
1- trunking mode - 2-trunk encapsulation - 3-native VLAN - 4-allowed VLAN
They must be carried over a voice VLAN (VVID) or over a regular data VLAN (ie. The native VLAN or the PVID)

44. How do you configure LACP standby links?
LACP port priority
2 seconds
A MAC is seen on a different port
Protects STP when a physical malfunction only allows traffic in 1 direction - even though the link shows as up (cisco proprietary)

45. What is DSCP codepoint EF(46)?
The TOS field in the header is used. 2 methods 3 bits or 6 bits
Switch(config-if)# vrrp xx where xx= group number
Critical...used most often for IPT
802.1w

46. what if a secondary VLAN?
Interim solution - uses same hardware as WEP - but uses TKIP encryption
Hosts associated with a secondary VLAN can communicate with ports on the primary but not with another secondary VLAN
Completed dhcp bindings - mac addresses - IP addresses - etc.
Forces the router to wait for a period of time after the switch is reloaded before attempting to overthrow

47. What does the reload keyword do in HSRP?
A key string of up to 8 characters is sent. Default is cisco.
Forces the router to wait for a period of time after the switch is reloaded before attempting to overthrow
1- root bridge is elected - 2-the state of eery switch port in the STP domain must be brought from blocking state to the appropriate state
A single broadcast domain

48. What is the GLBP group and priority range
Group (0-1023) priority (1-255 higher better def 100)
Frames that barely exceed 1518B or 1622B due to headers
Yes
No

49. What does the SP do?
Another router must have a higher HSRP priority and have preemt set up
1-(opt) set system priority - 2-select interface(s) - 3-assign the protocol - 4-set the mode - 5-(opt) set the port priority
Listens to the first packet going to router and away from the router. If it can switch in both directions - it learns a shortcut path so subsequent packets can be switched without the RP
The distribution layer should have only L3 links

50. How does PAgP form etherchannels?
2 seconds
Only on ports that have same static VLANs or trunking. It also modifies parameters of the channel if one of the ports is modified
Each network device handles packets individually with no advance reservations
5 (0-4 with 4 being the highest)