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Networking > Switches > Flashcards

Switches Flashcards

1
Q

How many broadcast domains and collision domains does a switch have?

A

one broadcast, many collision

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2
Q

Where do switches store MAC addresses?

A

CAM table

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3
Q

If a device’s MAC Address is not stored in the CAM table, what does the switch do the first time the device with the new MAC address communicates?

A

stores the source address

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4
Q

What type of Carrier Sense Multiple Access does Ethernet-based systems use?

A

CSMA/CD

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5
Q

What is flooding?

A

sending data to all ports except source port

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6
Q

What is an ASIC?

A

application specific integrated circuit

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7
Q

What type of Carrier Sense Multiple Access does wireless systems use?

A

CSMA/CA

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8
Q

How many broadcast domains and collision domains do hubs have?

A

one broadcast, one collision

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9
Q

What symbol can be used to filter results in IOS?

A

(pipe)

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10
Q

The command “show mac address-table” shows only the MAC addresses on directly connected devices. True or false?

A

False

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11
Q

Which command is used to show directly connected Cisco devices?

A

show cdp neighbors

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12
Q

How would you enable SSH on a switch device?

A

enter configuration
ip domain-name “domain-name”
crypto key generate rsa
transport input telnet SSH

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13
Q

What command can be used to prevent timeouts when logged onto a IOS device?

A

no exec-timeout

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14
Q

How would you assign a static IP address to a switch?

A

ip address (ip address) (subnet mask)

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15
Q

What is the default speed and duplex of FastEthernet?

A

100 mbps, half duplex

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16
Q

Which of the following will allow you to send OR receive at any given time, but will not allow you to do both simultaneously?

A

half duplex

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17
Q

When using Fast Ethernet, it is best practice to enable Auto-detection on key devices. True or false?

A

False

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18
Q

When using Fast Ethernet on key devices, what is the best practice for speed and duplex?

A

100 mbps, full duplex

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19
Q

What are the two primary styles of port security?

A

Limit what MAC addresses exist on an interface

Limit quantity of MAC addresses per interface

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20
Q

What are the three types of responses for port security?

A

protect, restrict, shutdown

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21
Q

What does the security response “shutdown” do?

A

the port will be disabled till reenabled

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22
Q

What does the security response “protect” do?

A

the port will prevent other devices from accessing the port

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23
Q

What does the security response “restrict” do?

A

the port will prevent other devices and log information

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24
Q

After the port is enabled as an access port, which command is used to limit MAC addresses to the port?

A

switchport port-security maximum (x)

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25
Q

What is the maximum default MAC address when port security is enabled?

A

1

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26
Q

Which of the following will enable port security on an interface to learn a sticky MAC address?

A

switchport port-security mac-address sticky

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27
Q

When examining an interface, what do input errors and CRC usually indicate?

A

bad interface, cabling issue

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28
Q

When examining an interface, what do collisions usually indicate?

A

duplex mismatch

29
Q

How do late collisions usually occur?

A

cable exceeding 100m or too many devices in between connection

30
Q

What causes interface resets to occur?

A

excess errors, high error accrual

31
Q

To show the details of an interface, you can use the following command: show interface FastEthernet x/x. True or false?

A

True

32
Q

In order to verify frame integrity, where would you look in the interface details output?

A

CRC

33
Q

Every interface of a router is a _______.

A

subnet, broadcast domain

34
Q

VLANs are responsible for creating ________.

A

broadcast domains, subnets, networks

35
Q

Which port is responsible for carrying VLANs so that they are on different switches?

A

trunk port

36
Q

What is the encapsulation protocol that is used for the trunk connection on ROAS?

A

dot1q

37
Q

What is a layer 3 switch?

A

switches with routing capabilities

38
Q

Are layer 3 switches software or hardware based?

A

hardware, ASIC

39
Q

What are access ports?

A

ports that only access 1 vlan

40
Q

What tagging protocol standard is used for all vlan connections?

A

802.1q, dot1q

41
Q

What is DTP?

A

dynamic trunking protocol

42
Q

What is the function of DTP?

A

automatically establish trunk ports between switches

43
Q

What is the default port mode on cisco switches?

A

DTP (dynamic trunk protocol)

44
Q

What is dynamic desirable mode?

A

sends DTP messages to try to create trunk port

45
Q

What is dynamic auto mode?

A

does NOT send DTP messages, will NOT try to create trunk ports

46
Q

Two auto ports facing each other will establish a trunk port. True or False

A

False

47
Q

What command disables DTP mode?

A

switchport nonegotiate

48
Q

How many VLAN numbers are you able to use?

A

4094

49
Q

What is the purpose of a native VLAN?

A

untagged traffic is directed to the native VLAN

50
Q

What is CDP?

A

cisco discovery protocol

51
Q

What traffic is usually untagged?

A

switch originated (CDP), pass-through (hub), virtualized servers

52
Q

Which command will show you the VTP that is running on your device?

A

show vtp status

53
Q

What are the three modes for VTP?

A

server, client, transparent

54
Q

What is VTP server mode?

A

all switches can make VTP changes

55
Q

What is VTP client mode?

A

one switch manages VTP

56
Q

What is VTP transparent mode?

A

“off” mode

57
Q

What command will show which VLANs are on the switch?

A

show vlan

58
Q

What is the command to assign a VLAN to a switch port?

A

switchport access vlan (x)

59
Q

Which command will enable VLAN capabilities on a port?

A

switchport mode access

60
Q

The show command to display details about a switchport mode is ‘show interfaces fxx/x switchport’. True or false?

A

True

61
Q

A switch running in VTP client mode version 2 on cbtnuggets.com domain is not receiving the revision updates from the VTP server on version 2 from domain CBTNuggets.com. What is the problem?

A

the domains needs to match (case sensitive)

62
Q

What is the default state of switchport?

A

dynamic desirable

63
Q

What is a good command to see packet statistics of an interface?

A

show interfaces ‘type’

64
Q

If an interface is down, what commands would you use to enable the interface?

A

shutdown then no shutdown

65
Q

What commands could be used to troubleshoot a network interface connection?

A

show ip interface brief

show interfaces ‘type’

66
Q

Trunk ports are displayed in the ‘show vlan’ command. True or False

A

False

67
Q

What command is used to clear the counters on an interface?

A

clear counters ‘type’

68
Q

What command can be used to add vlans to a trunk?

A

switchport trunk allowed vlan add x

Networking (9 decks)

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