Switch and IOS Fundamentals Flashcards
What layer does a switch operate at?
Layer 2 devices with many ports designed to forward frames from source to destination, according to specific MAC addresses in the frame (Data-Link Layer).
What is a forwarding decision
Forwarding frames in accordance with their destination addresses and MAC tables using a MAC learning process
What commend displays the MAC address table?
show mac address-table
What information will the MAC address table show?
VLAN, MAC Address, Dynamic or static, associated physical ports
What is a DYNAMIC frame?
Frame with a source MAC that arrives at a switch
and updates the table with the MAC address for that port.
What is a STATIC frame
Frame that has a manually configured MAC address on a switch.
What are the 3 switching methods?
Store-and-forward, Cut-through, Fragment Free
Explain store-and-forward switching?
Store-and-forward method buffers the entire frame upon receipt. This enables the switch to support various port speeds. Error checking takes place after entire frame is received. Relatively slow but supports different speeds.
Explain cut-through switching?
In cut-through only the first 6 bytes of the incoming frame are buffered, meaning the switch only regards the destination MAC address of the frame. Switch forwards immediately no error checking. Disadvantage is because no error checking frame can be corrupt.
Explain Fragment free switching?
Fragment-free buffers the first 64 bytes of the frame, including MAC address data and
the frame’s payload, also performing partial error checking to make sure there is no fragmentation on the first 64 bytes of the frame.
What is Half Duplex?
A connection for which the communication is restricted to exchanging data in one direction at a time example Wireless is half duplex
What is Full-Duplex?
Full-duplex means that data can be transmitted in both directions, on a signal carrier, at the same time.
What are switch ports transfer speeds?
10 Mbps, 100 Mbps,or 1000 Mbps
What is Auto-Negotiation?
Auto-negotiation tells connected devices to announce their
capabilities, and then, based on the settings of the interconnected
device at the other end, chooses the optimal speed and duplex mode. Done by default.
What is a NOS Network Operating System ?
Operating System for a device
What is an IOS Internetwork Operating System?
CLI-based system, and users interface with it using text-based Cisco commands.
What is Cisco Packet Tracer?
Cisco Packet Tracer allows the user to map a network. Packet Tracer enables the testing of network configurations, trains users to work with network configuration, helps them understand how a network operates, and provides them with network deployment experience.
What is CLI?
Command Line Interface is a means of interacting with programs by entering commands on the command line. Advantage is minimum resources usage, faster ability to operate on the system
What is Terminal Emulation?
Used to configure an intermediary device when connecting with a console cable. software, such as PuTTY. TE programs enable configuration of local devices using a
serial cable or a remote management protocol, such as SSH.
What is Putty?
Versatile tool for remote access to another
computer. It is often used by people who want secure
remote shell access to a UNIX or Linux system, though that
is only one of its many uses.
What is Out-of-Band Access Method?
Uses a dedicated management console
cable that must be physically connected to the device.
Initial configuration is usually done using this method.
What is In-Band Access Method?
This method uses management protocols, such as SSH
or Telnet, which access the device remotely over the
network.
What are the 3 IOS Work Modes Structure?
Permissions, Modes, Structure
What is User EXEC Mode?
Low-level capabilities but is useful for basic operations. It has a limited
number of monitoring commands and does not allow device configuration changes. (ping, enable and limited show) Router>
