Switches

Question 1

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

Answer 1

one broadcast, many collision

Question 2

Where do switches store MAC addresses?

Answer 2

CAM table

Question 3

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?

Answer 3

stores the source address

Question 4

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

Answer 4

CSMA/CD

Question 5

What is flooding?

Answer 5

sending data to all ports except source port

Question 6

What is an ASIC?

Answer 6

application specific integrated circuit

Question 7

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

Answer 7

CSMA/CA

Question 8

How many broadcast domains and collision domains do hubs have?

Answer 8

one broadcast, one collision

Question 9

What symbol can be used to filter results in IOS?

Answer 9

(pipe)

Question 10

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

Answer 10

False

Question 11

Which command is used to show directly connected Cisco devices?

Answer 11

show cdp neighbors

Question 12

How would you enable SSH on a switch device?

Answer 12

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

Question 13

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

Answer 13

no exec-timeout

Question 14

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

Answer 14

ip address (ip address) (subnet mask)

Question 15

What is the default speed and duplex of FastEthernet?

Answer 15

100 mbps, half duplex

Question 16

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

Answer 16

half duplex

Question 17

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

Answer 17

False

Question 18

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

Answer 18

100 mbps, full duplex

Question 19

What are the two primary styles of port security?

Answer 19

Limit what MAC addresses exist on an interface

Limit quantity of MAC addresses per interface

Question 20

What are the three types of responses for port security?

Answer 20

protect, restrict, shutdown

Question 21

What does the security response “shutdown” do?

Answer 21

the port will be disabled till reenabled

Question 22

What does the security response “protect” do?

Answer 22

the port will prevent other devices from accessing the port

Question 23

What does the security response “restrict” do?

Answer 23

the port will prevent other devices and log information

Question 24

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

Answer 24

switchport port-security maximum (x)

Question 25

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

Answer 25

1

Question 26

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

Answer 26

switchport port-security mac-address sticky

Question 27

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

Answer 27

bad interface, cabling issue

Question 28

When examining an interface, what do collisions usually indicate?

Answer 28

duplex mismatch

Question 29

How do late collisions usually occur?

Answer 29

cable exceeding 100m or too many devices in between connection

Question 30

What causes interface resets to occur?

Answer 30

excess errors, high error accrual

Question 31

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

Answer 31

True

Question 32

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

Answer 32

CRC

Question 33

Every interface of a router is a _______.

Answer 33

subnet, broadcast domain

Question 34

VLANs are responsible for creating ________.

Answer 34

broadcast domains, subnets, networks

Question 35

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

Answer 35

trunk port

Question 36

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

Answer 36

dot1q

Question 37

What is a layer 3 switch?

Answer 37

switches with routing capabilities

Question 38

Are layer 3 switches software or hardware based?

Answer 38

hardware, ASIC

Question 39

What are access ports?

Answer 39

ports that only access 1 vlan

Question 40

What tagging protocol standard is used for all vlan connections?

Answer 40

802.1q, dot1q

Question 41

What is DTP?

Answer 41

dynamic trunking protocol

Question 42

What is the function of DTP?

Answer 42

automatically establish trunk ports between switches

Question 43

What is the default port mode on cisco switches?

Answer 43

DTP (dynamic trunk protocol)

Question 44

What is dynamic desirable mode?

Answer 44

sends DTP messages to try to create trunk port

Question 45

What is dynamic auto mode?

Answer 45

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

Question 46

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

Answer 46

False

Question 47

What command disables DTP mode?

Answer 47

switchport nonegotiate

Question 48

How many VLAN numbers are you able to use?

Answer 48

4094

Question 49

What is the purpose of a native VLAN?

Answer 49

untagged traffic is directed to the native VLAN

Question 50

What is CDP?

Answer 50

cisco discovery protocol

Question 51

What traffic is usually untagged?

Answer 51

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

Question 52

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

Answer 52

show vtp status

Question 53

What are the three modes for VTP?

Answer 53

server, client, transparent

Question 54

What is VTP server mode?

Answer 54

all switches can make VTP changes

Question 55

What is VTP client mode?

Answer 55

one switch manages VTP

Question 56

What is VTP transparent mode?

Answer 56

"off" mode

Question 57

What command will show which VLANs are on the switch?

Answer 57

show vlan

Question 58

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

Answer 58

switchport access vlan (x)

Question 59

Which command will enable VLAN capabilities on a port?

Answer 59

switchport mode access

Question 60

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

Answer 60

True

Question 61

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?

Answer 61

the domains needs to match (case sensitive)

Question 62

What is the default state of switchport?

Answer 62

dynamic desirable

Question 63

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

Answer 63

show interfaces 'type'

Question 64

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

Answer 64

shutdown then no shutdown

Question 65

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

Answer 65

show ip interface brief | show interfaces 'type'

Question 66

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

Answer 66

False

Question 67

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

Answer 67

clear counters 'type'

Question 68

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

Answer 68

switchport trunk allowed vlan add x