Mod 1-2 switch concepts

57. A technician is configuring a new Cisco 2960 switch. What is the effect of issuing the BranchSw(config-if)# exit command?

It returns to global configuration mode.

18. Which switch characteristic helps keep traffic local and alleviates network congestion?

high port density

11. What is the minimum Ethernet frame size that will not be discarded by the receiver as a runt frame?

64 bytes

23. Refer to the exhibit. How many broadcast domains are displayed?

8

6. Which statement describes SVIs?

A default SVI is created for VLAN 1 for switch administration.

4. What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?

Forward the frame out all ports except the port where the frame is received.

16. Which statement is correct about Ethernet switch frame forwarding decisions?

Frame forwarding decisions are based on MAC address and port mappings in the CAM table.

14. Which characteristic describes cut-through switching?

Frames are forwarded without any error checking.

9. Which two statements are true about half-duplex and full-duplex communications? (Choose two.)

Full duplex increases the effective bandwidth. Full duplex allows both ends to transmit and receive simultaneously.

30. What happens to switch ports after the VLAN to which they are assigned is deleted?

The ports stop communicating with the attached devices.

11. Which option correctly describes a switching method?

store-and-forward: ensures that the frame is free of physical and data-link errors

14. Which network device can be used to eliminate collisions on an Ethernet network?

switch

7. Which prompt is displayed when a network administrator successfully accesses the boot loader on a switch to recover from a system crash?

switch:

7. What does the term "port density" represent for an Ethernet switch?

the number of available ports

8. Which information does a switch use to keep the MAC address table information current?

the source MAC address and the incoming port

8. Which router bootup sequence is correct?​

1 - perform the POST and load the bootstrap program2 - locate and load the Cisco IOS software3 - locate and load the startup configuration file or enter setup mode

15. What is the significant difference between a hub and a Layer 2 LAN switch?

A hub extends a collision domain, and a switch divides collision domains.

3. What is the significant difference between a hub and a Layer 2 LAN switch?

A switch creates many smaller collision domains, and a hub increases the size of a single collision domain.

19. Which switch component reduces the amount of packet handling time inside the switch?

ASIC

1. Which statement is true about broadcast and collision domains?

Adding a switch to a network will increase the size of the broadcast domain.

8. What does a switch use to locate and load the IOS image?

BOOT environment variable

5. A network administrator has configured ​VLAN 99 as the management VLAN and has configured it with an IP address and subnet mask. The administrator issues the show interface vlan 99 command and notices that the line protocol is down. Which action can change the state of the line protocol to up?

Connect a host to an interface associated with VLAN 99.

2. Which statement describes the system LED operation on Cisco Catalyst switches?

If the LED is amber, the system is receiving power but it is not functioning properly.

58. A technician is configuring a new Cisco 2960 switch. What is the effect of issuing the BranchSw(config-if)# duplex full command?

It allows data to flow in both directions at the same time on the interface.

51. A technician is configuring a new Cisco 2960 switch. What is the effect of issuing the BranchSw(config-if)# ip address 172.18.33.88 255.255.255.0 command?

It applies an IPv4 address to the virtual interface.

56. A technician is configuring a new Cisco 2960 switch. What is the effect of issuing the BranchSw(config-if)# ipv6 address 2001:db8:a2b4:88::1/64 command?

It applies an IPv6 address to the virtual interface.

50. A technician is configuring a new Cisco 2960 switch. What is the effect of issuing the BranchSw(config-if)# mdix auto command?

It automatically adjusts the port to allow device connections to use either a straight-through or a crossover cable.

55. A technician is configuring a new Cisco 2960 switch. What is the effect of issuing the BranchSw(config-if)# shutdown command?

It disables a virtual or physical switch interface.

58. A technician is configuring a new Cisco 2960 switch. What is the effect of issuing the BranchSw> enable command?

It enters privileged mode.

52. A technician is configuring a new Cisco 2960 switch. What is the effect of issuing the BranchSw# configure terminal command?

It enters the global configuration mode.

10. What is a characteristic of an IPv4 loopback interface on a Cisco IOS router?​

It is a logical interface internal to the router.

9. Which protocol adds security to remote connections?

SSH

1. Which tasks can be accomplished by using the command history feature? (Choose two.)

Set the command history buffer size. Recall previously entered commands.

13. What is the purpose of frame buffers on a switch?

They hold traffic, thus alleviating network congestion.

17. How do switch buffers affect network performance?

They store frames received, thus preventing premature frame discarding when network congestion occurs.

12. After which step of the switch bootup sequence is the boot loader executed?

after POST execution

13. Which impact does adding a Layer 2 switch have on a network?

an increase in the size of the broadcast domain

7. Which command is used to set the BOOT environment variable that defines where to find the IOS image file on a switch?

boot system

3. What type of Ethernet cable would be used to connect one switch to another switch when neither switch supports the auto-MDIX feature?

crossover

2. What is one function of a Layer 2 switch?

determines which interface is used to forward a frame based on the destination MAC address

4. What advantage does SSH offer over Telnet?

encryption

5. Which switch characteristic helps alleviate network congestion when a 10 Gbps port is forwarding data to a 1 Gbps port?

frame buffering

9. What is the first action in the boot sequence when a switch is powered on?

load a power-on self-test program

70. Refer to the exhibit. A network administrator has configured R1 as shown. When the administrator checks the status of the serial interface, the interface is shown as being administratively down. What additional command must be entered on the serial interface of R1 to bring the interface up?

no shutdown

6. If one end of an Ethernet connection is configured for full duplex and the other end of the connection is configured for half duplex, where would late collisions be observed?

on the half-duplex end of the connection

10. What must an administrator have in order to reset a lost password on a router?

physical access to the router

12. Which network device can serve as a boundary to divide a Layer 2 broadcast domain?

router

12. Which command will provide information about the status of all interfaces including the number of giants, runts, and collisions on the interface?

show interfaces

10. Which type of address does a switch use to build the MAC address table?

source MAC address

21. What information is added to the switch table from incoming frames?

source MAC address and incoming port number

22. Which switching method ensures that the incoming frame is error-free before forwarding?

store-and-forward

6. Which switching method makes use of the FCS value?

store-and-forward

11. When configuring a switch for SSH access, what other command that is associated with the login local command is required to be entered on the switch?

username username secret secret