1.3 Ethernet LANs: Design, VLANs, and Troubleshooting Q/A

Analyzing Ethernet LAN Designs

1. Which of the following devices would be in the same collision domain as PC1?

a. PC2, which is separated from PC1 by an Ethernet hub b. PC3, which is separated from PC1 by a transparent bridge c. PC4, which is separated from PC1 by an Ethernet switch d. PC5, which is separated from PC1 by a router

2. Which of the following devices would be in the same broadcast domain as PC1? (Choose three answers.)

a. PC2, which is separated from PC1 by an Ethernet hub b. PC3, which is separated from PC1 by a transparent bridge c. PC4, which is separated from PC1 by an Ethernet switch d. PC5, which is separated from PC1 by a router

3. In a two-tier campus LAN design, which of the following are typically true of the topology design? (Choose two answers.)

a. The design uses a full mesh of links between access and distribution switches b. The design uses a partial mesh of links between access and distribution switches c. The design uses a partial mesh of links between the distribution and core switches d. The end user and server devices connect directly to access layer switches

4. In a three-tier campus LAN design, which of the following are typically true of the topology design? (Choose two answers.)

a. The design uses a partial mesh of links between access and distribution switches b. The design uses a full mesh of links between access and distribution switches c. The design uses a partial mesh of links between the distribution and core switches d. The end user and server devices connect directly to distribution layer switches

5. Which one answer gives the strongest match between one part of a typical three-tier design with the idea behind the listed generic topology design term?

a. The access layer looks like a partial mesh. b. The distribution layer looks like a full mesh. c. The distribution layer looks like a hybrid design. d. The access layer looks like a star design.

6. Which of the following Ethernet standards support a maximum cable length of longer than 100 meters? (Choose two answers.)

a. 100BASE-T b. 1000BASE-SX c. 1000BASE-T d. 1000BASE-LX

Troubleshooting Ethernet LAN's

1. Which answers describe a good practice in applying good troubleshooting methodologies? (Choose two answers.)

a. Perform problem isolation as fast as possible, including not slowing down to document your findings. b. The last step in a good troubleshooting process should be to take action to resolve the root cause of the problem. c. The last step in a good troubleshooting process should include monitoring the status to ensure that the problem is indeed solved and does not recur. d. Each worker should know and use the escalation process when they cannot resolve a particular problem.

2. The output of the show interfaces status command on a 2960 switch shows interface Fa0/1 in a “disabled” state. Which of the following is true about interface Fa0/1? (Choose three answers.)

a. The interface is configured with the shutdown command. b. The show interfaces fa0/1 command will list the interface with two status codes of administratively down and line protocol down. c. The show interfaces fa0/1 command will list the interface with two status codes of up and down. d. The interface cannot currently be used to forward frames. e. The interface can currently be used to forward frames.

3. Switch SW1 uses its Gigabit 0/1 interface to connect to switch SW2’s Gigabit 0/2 interface. SW2’s Gi0/2 interface is configured with the speed 1000 and duplex full commands. SW1 uses all defaults for interface configuration commands on its Gi0/1 interface. Which of the following are true about the link after it comes up? (Choose two answers.)

a. The link works at 1000 Mbps (1 Gbps). b. SW1 attempts to run at 10 Mbps because SW2 has effectively disabled IEEE standard autonegotiation. c. The link runs at 1 Gbps, but SW1 uses half-duplex and SW2 uses full duplex. d. Both switches use full duplex.

4. In the following line taken from a show interfaces fa0/1 command, which of the following are true about the interface? (Choose two answers.)

Full-duplex, 100Mbps, media type is 10/100BaseTX 

a. The speed was definitely configured with the speed 100 interface subcommand. b. The speed might have been configured with the speed 100 interface subcommand. c. The duplex was definitely configured with the duplex full interface subcommand. d. The duplex might have been configured with the duplex full interface subcommand.

5. Which of the following commands list the MAC address table entries for MAC addresses configured by port security? (Choose two answers.)

a. show mac address-table dynamic b. show mac address-table c. show mac address-table static d. show mac address-table port-security

6. On a Cisco Catalyst switch, you issue a show mac address-table command. Which of the following answers list information you would likely see in most lines of output? (Choose two answers.)

a. A MAC address b. An IP address c. A VLAN ID d. Type (broadcast, multicast, or unicast)

7. The show port-security interface f0/1 command lists a port status of secure-down. Which one of the following answers must be true about this interface at this time?

a. The show interface status command lists the interface status as connected. b. The show interface status command lists the interface status as err-disabled. c. The show port-security interface command could list a mode of shutdown or restrict, but not protect. d. The show port-security interface command could list a violation counter value of 10.

8. The show interfaces g0/1 switchport command on SW1 shows the trunking status on a link connected to switch SW2. Based on the output, which of the following must be true on SW2’s port connected to this link?

SW1# show interfaces gigabit0/1 switchport 

Name: Gi0/1 

Switchport: Enabled 

Administrative Mode: trunk 

Operational Mode: trunk

a. The operational state per show interfaces switchport must be “trunk.” b. The administrative state per show interfaces switchport must be “trunk.” c. SW2 must use the switchport mode trunk configuration command on G0/2, or the link will not use trunking. d. SW2 can use the switchport mode dynamic auto configuration command as one option to make the link use trunking.