CCNA Chapter 5 Study Guide
What are the two sizes (minimum and maximum) of an Ethernet frame? (Choose two.)
64 bytes 1518 bytes*
What addressing information is recorded by a switch to build its MAC address table?
the source Layer 2 address of incoming frames
Adjectives of store-and-foward
-always stores the entire frame -checks the CRC before forwarding -checks the frame length before forwarding
Adjectives of cut-through
-has low latency -may forward runt frames -begins forwarding when the destination address is recived
Which destination address is used in an ARP request frame
FFFF.FFFF.FFFF
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.
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
Fill in the blank A collision fragment, also known as a ____ frame, is a frame of fewer than 64 bytes in length.
RUNT
What statement describes Ethernet?
It defines the most common LAN type in the world
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 The data link layer uses LLC to communicate with the upper layers of the protocol suite
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.
Which statement is true about MAC addresses?
The first three bytes are used by the vendor assigned OUI
What happens to runt frames received by a Cisco Ethernet switch?
The frame is dropped.
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
What is auto-MDIX
a feature that detects Ethernet cable type
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
Fill in the blank. On a Cisco switch, ____ memory buffering is used to buffer frames in queues linked to specific incoming and outgoing ports.
port-based
Fill in the blank. 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
Which switching method uses the CRC value in a frame?
store-and-forward
