ITN Chapter 5 Exam Online

1. Question

1 points

What happens to runt frames received by a Cisco Ethernet switch?

The frame is dropped.
The frame is returned to the originating network device.
The frame is broadcast to all other devices on the same network.
The frame is sent to the default gateway.

2. Question

2 points

What are the two sizes (minimum and maximum) of an Ethernet frame? (Choose two.)

56 bytes
64 bytes
128 bytes
1024 bytes
1518 bytes

3. Question

1 points

What statement describes Ethernet?

It defines the most common LAN type in the world.
It is the required Layer 1 and 2 standard for Internet communication.
It defines a standard model used to describe how networking works.
It connects multiple sites such as routers located in different countries.

4. Question

2 points

Which two statements describe features or functions of the logical link control sublayer in Ethernet standards? (Choose two.)

Logical link control is implemented in software.
Logical link control is specified in the IEEE 802.3 standard.
The LLC sublayer adds a header and a trailer to the data.
The data link layer uses LLC to communicate with the upper layers of the protocol suite.
The LLC sublayer is responsible for the placement and retrieval of frames on and off the media.

5. Question

1 points

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

64 bytes
512 bytes
1024 bytes
1500 bytes

6. Question

1 points

What statement describes a characteristic of MAC addresses?

They must be globally unique.
They are only routable within the private network.
They are added as part of a Layer 3 PDU.
They have a 32-bit binary value.

7. Question

1 points

Which statement is true about MAC addresses?

MAC addresses are implemented by software.
A NIC only needs a MAC address if connected to a WAN.
The first three bytes are used by the vendor assigned OUI.
The ISO is responsible for MAC addresses regulations.

8. Question

1 points

Which destination address is used in an ARP request frame?

0.0.0.0
255.255.255.255
FFFF.FFFF.FFFF
127.0.0.1
01-00-5E-00-AA-23

9. Question

1 points

What addressing information is recorded by a switch to build its MAC address table?

the destination Layer 3 address of incoming packets
the destination Layer 2 address of outgoing frames
the source Layer 3 address of outgoing packets
the source Layer 2 address of incoming frames

10. Question

1 points

Refer to the exhibit. The exhibit shows a small switched network and the contents of the MAC address table of the switch. PC1 has sent a frame addressed to PC3. What will the switch do with the frame?

ITN Chapter 5 Exam Answers 001

The switch will discard the frame.
The switch will forward the frame only to port 2.
The switch will forward the frame to all ports except port 4.
The switch will forward the frame to all ports.
The switch will forward the frame only to ports 1 and 3.

11. Question

1 points

Which switching method uses the CRC value in a frame?

cut-through
fast-forward
fragment-free
store-and-forward

12. Question

1 points

What is a characteristic of port-based memory buffering?

All frames are stored in a common memory buffer.
Frames are buffered in queues linked to specific ports.
All ports on a switch share a single memory buffer.
Frames in the memory buffer are dynamically linked to destination ports.

13. Question

1 points

What is auto-MDIX?

a type of Cisco switch
an Ethernet connector type
a type of port on a Cisco switch
a feature that detects Ethernet cable type

14. Question

1 points

True or False?
When a device is sending data to another device on a remote network, the Ethernet frame is sent to the MAC address of the default gateway.

true
false

15. Question

1 points

The ARP table in a switch maps which two types of address together?

Layer 3 address to a Layer 2 address
Layer 3 address to a Layer 4 address
Layer 4 address to a Layer 2 address
Layer 2 address to a Layer 4 address

16. Question

1 points

Refer to the exhibit. PC1 issues an ARP request because it needs to send a packet to PC2. In this scenario, what will happen next?

ITN Chapter 5 Exam Answers 004

PC2 will send an ARP reply with its MAC address.
RT1 will send an ARP reply with its Fa0/0 MAC address.
RT1 will send an ARP reply with the PC2 MAC address.
SW1 will send an ARP reply with the PC2 MAC address.
SW1 will send an ARP reply with its Fa0/1 MAC address.

17. Question

1 points

Refer to the exhibit. A switch with a default configuration connects four hosts. The ARP table for host A is shown. What happens when host A wants to send an IP packet to host D?

ITN Chapter 5 Exam Answers 003

Host A sends an ARP request to the MAC address of host D.
Host D sends an ARP request to host A.
Host A sends out the packet to the switch. The switch sends the packet only to the host D, which in turn responds.
Host A sends out a broadcast of FF:FF:FF:FF:FF:FF. Every other host connected to the switch receives the broadcast and host D responds with its MAC address.

18. Question

1 points

Refer to the exhibit. The switches are in their default configuration. Host A needs to communicate with host D, but host A does not have the MAC address for its default gateway. Which network hosts will receive the ARP request sent by host A?

ITN Chapter 5 Exam Answers 002

only host D
only router R1
only hosts A, B, and C
only hosts A, B, C, and D
only hosts B and C
only hosts B, C, and router R1

19. Question

1 points

Which statement describes the treatment of ARP requests on the local link?

They must be forwarded by all routers on the local network.
They are received and processed by every device on the local network.
They are dropped by all switches on the local network.
They are received and processed only by the target device.

20. Question

2 points

What are two potential network problems that can result from ARP operation? (Choose two.)

Manually configuring static ARP associations could facilitate ARP poisoning or MAC address spoofing.
On large networks with low bandwidth, multiple ARP broadcasts could cause data communication delays.
Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent of intercepting network traffic.
Large numbers of ARP request broadcasts could cause the host MAC address table to overflow and prevent the host from communicating on the network.
Multiple ARP replies result in the switch MAC address table containing entries that match the MAC addresses of hosts that are connected to the relevant switch port.

21. Question

1 points

What is the aim of an ARP spoofing attack?

to flood the network with ARP reply broadcasts
to fill switch MAC address tables with bogus addresses
to associate IP addresses to the wrong MAC address
to overwhelm network hosts with ARP requests

22. Question

6 points

Match the characteristic to the forwarding method. (Not all options are used.)

Sort elements

has low latency
may forward runt frames
begins forwarding when destinations address is received
always store the entire frame
checks the CRC before forwarding
checks the frame length before forwarding
does not forward broadcasts

cut-through
cut-through
cut-through
store-and-forward
store-and-forward
store-and-forward

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