220.127.116.11 laboratory – the town hall Network device MAC Addresses Answers
Lab – the town hall Network maker MAC Addresses (Answers version – Optional Lab)
Answers Note: Red font color or gray highlights show text that shows up in the instructor copy only. Optional activities are designed to boost understanding and/or come provide extr practice.
You are watching: Can you have broadcasts at the layer 2 level
You have the right to use a variety of regulates to display screen MAC addresses on the switch.Console into S1 and use the show interfaces vlan 1 command to discover the MAC attend to information. A sample is shown below. Use output produced by your switch to answer the questions.S1# show interfaces vlan 1Vlan1 is up, heat protocol is up Hardware is EtherSVI, address is 001b.0c6d.8f40 (bia 001b.0c6d.8f40) Internet attend to is 192.168.1.1/24 MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, dependability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not collection Keepalive not supported ARP type: ARPA, ARP Timeout 04:00:00 last input never, output 00:14:51, output hang never ever Last clearing the “show interface” counters never ever Input queue: 0/75/0/0 (size/max/drops/flushes); total output drops: 0 Queueing strategy: fifo calculation queue: 0/40 (size/max) 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 0 packets input, 0 bytes, 0 no buffer received 0 broadcasts (0 IP multicasts) 0 runts, 0 giants, 0 throttles 0 intake errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 34 packets output, 11119 bytes, 0 underruns
0 output errors, 2 user interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
What is the MAC resolve for VLAN 1 on S1?____________________________________________________________________________________Answers will certainly vary based upon the switch the student is using. Using the output from above, the answer would certainly be 001b.0c6d.8f40.What is the MAC serial number because that VLAN 1?____________________________________________________________________________________Answers will certainly vary based upon the switch the student is using. Utilizing the output from above, the answer would certainly be 6d-8f-40.
What is the OUI because that VLAN 1?____________________________________________________________________________________Answers will vary based on the switch the college student is using. Using the calculation from above, the answer would certainly be 00-1b-0c.
Based ~ above this OUI, what is the surname of the vendor?____________________________________________________________________________________Cisco Systems
What does bia stand for?____________________________________________________________________________________Burned in address.
Why go the output present the same MAC attend to twice?____________________________________________________________________________________The MAC attend to can be changed via a software command. The actual deal with (bia) will still it is in there. It is presented in the parenthesis.Another means to display the MAC attend to on the move is to use the show arp command. Usage the show arp command to display MAC attend to information. This command maps the great 2 deal with to its equivalent Layer 3 address. A sample is displayed below. Use output generated by your switch come answer the questions.S1# show arpProtocol resolve Age (min) Hardware Addr form InterfaceInternet 192.168.1.1 – 001b.0c6d.8f40 ARPA Vlan1Internet 192.168.1.3 0 5c26.0a24.2a60 ARPA Vlan1What class 2 addresses are shown on S1?____________________________________________________________________________________S1 VLAN 1 and PC-A MAC addresses. If the student additionally records the MAC addresses, their answers will vary.What great 3 addresses are displayed on S1?____________________________________________________________________________________S1 and also PC-A IP addressesStep 3: check out the MAC addresses top top the switch.Issue the show mac address-table command ~ above S1. A sample is presented below. Usage output produced by her switch come answer the questions.
Answers Note: The show mac address-table command can vary based on the version switch you are using. For example, the syntax on part switches is show mac-address-table.
S1# show mac address-table
Mac address Table
Vlan Mac Address kind Ports
—- ———– ——– —–
All 0100.0ccc.cccc static CPU
All 0100.0ccc.cccd static CPU
All 0180.c200.0000 static CPU
All 0180.c200.0001 static CPU
All 0180.c200.0002 static CPU
All 0180.c200.0003 revolution CPU
All 0180.c200.0004 static CPU
All 0180.c200.0005 revolution CPU
All 0180.c200.0006 static CPU
All 0180.c200.0007 static CPU
All 0180.c200.0008 static CPU
All 0180.c200.0009 revolution CPU
All 0180.c200.000a revolution CPU
All 0180.c200.000b static CPU
All 0180.c200.000c static CPU
All 0180.c200.000d revolution CPU
All 0180.c200.000e revolution CPU
All 0180.c200.000f revolution CPU
All 0180.c200.0010 revolution CPU
All ffff.ffff.ffff static CPU
1 5c26.0a24.2a60 DYNAMIC Fa0/6
Total Mac Addresses for this criterion: 21
Did the switch screen the MAC deal with of PC-A? If you answered yes, what harbor was the on?
Yes. Port need to be F0/6. Answers will differ for the MAC address. In the instance above, the MAC attend to would be 5c26.0a24.2a60.
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ReflectionCan you have broadcasts in ~ the layer 2 level? If so, what would the MAC resolve be?_______________________________________________________________________________________You deserve to have broadcasts at Layer 2. ARP will use broadcasts to discover MAC resolve information. The broadcast resolve is FF.FF.FF.FF.FF.FF.Why would you need to know the MAC address of a device?_______________________________________________________________________________________There could be a selection of reasons. In a large network, it may be simpler to pinpoint location and also identity the a device by its MAC attend to instead the its IP address. The MAC OUI will certainly list the manufacturer, i m sorry may help narrow under the search. Security measures can be applied at layer 2, so knowledge of allowable MAC addresses is needed.
S1# show run