CCNP switch slides 10

Question 1

source

Answer 1

http://www.coursehero.com/flashcards/430770/CCNP-SWITCH-642-813-VLAN-Implementation/

Question 2

What are the two methods of identifying VLANs over trunk links? (i.e. trunking methods)

Answer 2

-ISL-802.1Q

Question 3

VLANs separate what?

Answer 3

Broadcast domains.

Question 4

How do you set a native VLAN for a trunk port?

Answer 4

(if)switchport trunk native vlan ##

Question 5

If a switch recieves a VTP advertisement with a lower configuration revision number, what will it do?

Answer 5

It will send the originator an update containing its higher revision number.

Question 6

How many classes of PoE are there, what are they, and what is the default class?

Answer 6

There are 5 classes, 0-4, and 0 is default.

Question 7

How do you set encapsulation methods on a trunk?

Answer 7

(if)switchport trunk encapsulate [isl, dot1q, negotiate]

Question 8

Is VTP version 1 compatible with version 2? How do you enable version 2 across an entire VTP domain?

Answer 8

-No, version 2 is NOT compatible with version 1.-Enabling VTP version 2 on the VTP server will enable it on all connected domain members capable of supporting it.

Question 9

What information is contained in the 802.1Q tag on a frame?

Answer 9

-The first two bytes are the the Tag-Protocol ID (always 0x8100 for dot1q).-The second two bytes are for the Tag Control Info, that contain the three-bit priority field (for CoS/QoS) and the VLAN ID is the last 12-bits.

Question 10

What is VTP?

Answer 10

VLAN Trunking Protocol, Cisco proprietary.

Question 11

What is DTP?

Answer 11

Dynamic Trunking Protocol - used for negotiating trunking states.

Question 12

What command will tell an interface to prune VLANs from a trunk?

Answer 12

(if)switchport trunk pruning vlan [add, except, remove, or none]

Question 13

What is the definition of an ‘Active’ VLAN?

Answer 13

One that has been defined and has ports assigned to carry it.

Question 14

What is the command to remove a VTP password from a VTP Domain?

Answer 14

(config)no vtp password

Question 15

What are the two types of VLANs?

Answer 15

-End-to-End (Multi-switch VLANs)-Local (stays on single switch)

Question 16

Define the difference between a physical subnet and a logical subnet.

Answer 16

-Physical, devices that share the same wire. -Logical, devices assigned to the same VLAN.

Question 17

What are the three types of VTP advertisements?

Answer 17

-Summary, send every 300 seconds or when a change occurs(like a heads-up)-Subset, sent only when changes occur, and contain only the changes.-Request, sent when a client needs info (like when it reboots or changes domains)

Question 18

When are frames tagged and untagged in trunking?

Answer 18

-Frames are tagged when leaving on a trunk, and untagged when arriving on a trunk.-Frames are tagged internally once received on a port, and untagged when they are sent out the destination port.

Question 19

What command can be used to check on the configuration revision number in VTP?

Answer 19

show vtp status

Question 20

VTP advertisements are sent as what type of frame? (Unicast, Broadcast, Multicast?)

Answer 20

Multicast frames when there is a change.

Question 21

What switchport mode, when configured on BOTH ends, will never establish a trunk?

Answer 21

dynamic AUTO.

Question 22

How do you enable vtp pruning?

Answer 22

(config)vtp pruning. Done on the server, this will enable it for an entire domain.

Question 23

What are the VLAN show commands?

Answer 23

show vlan, show vlan brief, show vlan id ##, show vlan name NAME

Question 24

What is the over-subscriber ratio of Access-to-Distribution and Distribution-to-Core?

Answer 24

A-D 20:1, D-C 4:1

Question 25

What are the commands to create a VLAN?

Answer 25

(global) vlan ##, name MYNAME (optional)

Question 26

What are the 5 DTP modes?

Answer 26

-Access, member of a single VLAN.-Trunk, port attempts to negotiate trunking.-Non-negotiate, port set to trunk but does NOT negotiate.-Dynamic Desirable, Actively negotiates a trunk, and links if other side is Trunk, DD, or DA.-Dynamic Auto. Passively waits for other side to negotiate trunk. Links if other side is trunk or DD.

Question 27

What are the three roles for a VTP switch?

Answer 27

-Server, create delete and rename.-Client, cannot make changes.-Transparent, local only create delete and rename.

Question 28

How do you set a trunk to allow only certain VLANs?

Answer 28

(if)switchport trunk allowed vlan ##s

Question 29

What happens if a non-trunking port receives an 802.1Q frame?

Answer 29

The tag field is ignored and the frame is switched normally at L2 with the Source and Destination MAC.

Question 30

What VTP version do switches use by default?

Answer 30

Version 1.

Question 31

How often does VTP send out advertisements, by default, and what do they contain?

Answer 31

Every 5 minutes, they contain the configuration revision number.

Question 32

How do you make a switchport into a trunk?

Answer 32

(if)switchport mode [trunk, dyn auto, dyn des]

Question 33

What are the 4 commands to configure a switch for VTP?

Answer 33

(config)vtp [server, client, transparent]vtp domain NAMEvtp password PASSWORDvtp version 2

Question 34

How often are DTP frames sent out on switchports?

Answer 34

Every 30 Seconds.

Question 35

What are the default ranges for VLAN numbers?

Answer 35

1-1005, with 1 being reserved for default, and 1002-1005 are reserved for legacy

Question 36

What is contained in the ISL header and trailer when tagging a frame?

Answer 36

a 15-bite VLAN ID field in the header, and a CRC value in the trailer.

Question 37

What are the commands to assign a port to a VLAN?

Answer 37

(if)switchport mode accessswitchport access vlan ##

Question 38

What command displays Power over Ethernet information about a switch?

Answer 38

(exec)show power inline

Question 39

What are the differences between VTP version 1 and version 2?

Answer 39

Version 2 supports Token Ring VLANs, transparent switches will pass both versions, and consistency checks are only performed when changes are manually configured.

Question 40

What is 802.1Q?

Answer 40

-Standards-based trunking protocol.-inserts a field into the original frame after source MAC address field.-Supports Ethernet and Token Ring.

Question 41

What are the ranges for extended VLANs and when can they be used?

Answer 41

1-4094 and only on a switch in Transparent VTP mode.

Question 42

What is ISL?

Answer 42

-Inter-Switch Link-Cisco proprietary-encapsulates frame in a 26-byte header containing VLAN info and a 4-byte trailer.-Protocol-independant-Can identify CDP and BPDU frames.