CCNA 1 Chapter 5 Exam

A collision fragment, also known as a ________ frame, is a frame of fewer than 64 bytes in length.

RUNT

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

The frame is dropped

What is the Layer 2 multicast MAC address that corresponds to the Layer 3 IPv4 multicast address 224.139.34.56?

01-00-5E-0B-22-38*

What is a characteristic of a contention-based access method?

It is a nondeterministic method.*

What is the purpose of the preamble in an Ethernet frame?

is used for timing synchronization*

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

- 64 bytes - 1518 bytes

Which two statements are correct about MAC and IP addresses during data transmission if NAT is not involved? (Choose two.)

-Destination and source MAC addresses have local significance and change every time a frame goes from one LAN to another. * -Destination IP addresses in a packet header remain constant along the entire path to a target host.*

Which destination address is used in an ARP request frame?

FFFF.FFFF.FFFF

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

Layer 3 address to a Layer 2 address

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?

The switch will forward the frame to all ports except port 4

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

They are received and processed by every device on the local network.

What statement describes a characteristic of MAC addresses?

They must be globally unique

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

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?

only hosts B, C, and router R1

On a Cisco switch, _________ memory buffering is used to buffer frames in queues linked to specific incoming and outgoing ports.

port-based

Which switching method uses the CRC value in a frame?

store-and-forward

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

the source Layer 2 address of incoming frames

What is the aim of an ARP spoofing attack?

to associate IP addresses to the wrong MAC address

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

64 bytes

Which two statement describes features or functions of logical link control sublayer in Ethernet standards? (Choose two.)

- Logical link control is implemented in software - The data link layer uses LLC to communicate with the upper layers of the protocol suite

What are two features of ARP? (Choose two.)

-If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast. -If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.

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

-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.

cut-through (A) -> cut-through (B) -> cut-through (C) -> store-and-forward (D) -> store-and-forward (E) -> store-and-forward (F) ->

-low latency (A)* -may forward runt frames (B)* -begins forwarding when the destination address is received (C)* -always stores the entire frame (D)* -checks the CRC before forwarding (E)* - checks the frame length before forwarding (F)

What is a characteristic of port-based memory buffering?

Frames are buffered in queues linked to specific ports.

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?

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

What statement describes Ethernet?

It defines the most common LAN type in the world.

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?

PC2 will send an ARP reply with its MAC address.

Which statement is true about MAC addresses?

The first three bytes are used by the vendor assigned OUI

What is auto-MDIX?

a feature that detects Ethernet cable type

ARP _________ is a technique that is used to send fake ARP messages to other hosts in the LAN. The aim is to associate IP addresses to the wrong MAC addresses.

spoofing