cisco chapter 5
What happens to runt frames received by a Cisco Ethernet switch?
The frame is dropped
What are the two sizes (minimum and maximum) of an Ethernet frame? (Choose two.)
64bytes-1518bytes
The exhiibit 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
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
A collision fragment, also known as a- frame, is a frame of fewer than 64 bytes in length.
RUNT
Which statement describes the treatment of ARP requests on the local link?
They are received and rocessed by every device on the local network.
What addressing information is recorded by a switch to build its MAC address table?
the source Layer 2 address of incoming frames.
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
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 sens out a broadcast of FF:FF:FF:FF:FF:FF. Every other host connected to the switch receives the boradcast and host Dresponds with its MAC address.
A host is trying to send a packet to a device on a remote LAN segment, but there are currently no mappings in its ARP cache. How will the device obtain a destination MAC address?
It will send an ARP request for the MAC address of the default gateway
The ARP table in a switch maps which two types of address together?
Layer 3 address to a Layer 2 address
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?
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.
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.
store-and-forward
always stores the entire frame checks the CRC before forwarding checks the frame length before forwarding
cut-through
has low latency may forward runt frames begins forwarding whent he destination address is recieved
What is the purpose of the preamble in an Ethernet frame?
is used for timing synchronization
What statements describes Ethernet?
it defines the most common LAN type in the world
The switches are in their default cofiguration. Host A needs to communicate with host D, but host A doesn 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
A Layer 2 switch is used to switch incoming frames from a 1000BASE-T port to a port connected to a 100Base-T network. Which method of memory buffering would work best for this task?
shared memory buffering
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
What statement describes a characteristic of MAC addresses?
they must be globally unique
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
Which address or combination of addresses does a Layer 3 switch use to make forwarding decisions?
MAC and IP addresses
What is auto-MDIX
a feature that detects Ethernet cable type
