How is the Ethernet standard updated?
Through amendments, which are given lowercase letters
During normal STP operations, what type of cost will the non-root switch that is chosen as an alternative path have?
- Highest
What is used to identify the VLAN to which a frame being sent to another switch belongs?
- 802.1q tag
Choose the steps that take place during switch forwarding.
- Examine the source address of that frame
- Add the device MAC address to the switch lookup table
- Examine the destination MAC address and find a match in the switch lookup table for that MAC addre
- Send that frame out to that port
What does PoE do?
- It powers devices using DC delivered over UTP from the switch.
Match the Ethernet II field to its correct description.
- Data payload - Sized between 46 bytes and 1500 bytes
- Type - Identifies protocol being transported
- FCS - Contains CRC
- Destination MAC - Identifies where the frame is going
- Preamble - Provides clocking and synchronization
- Source MAC - Identifies who sent the frame
Which of the following are benefits of switches? (Select all correct answers.)
- Switches are plug-and-play devices.
- witches improve security by sending traffic only to the addressed device.
Why is Ethernet so popular?
- Because it's relatively low cost
Why might a switch flood broadcast frames?
- The destination MAC address is the broadcast address
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Which of the following statements is true regarding Ethernet MAC addresses?
- Ethernet addresses are 6 bytes long and are burned into the NIC. The first 3 bytes identify the manufacturer, and the last 3 bytes identify the card.
:
Match the Ethernet II field to its correct description.
- Type - Identifies protocol being transported
- FCS - Contains CRC
- Preamble - Provides clocking and synchronization
- Destination MAC - Identifies where the frame is going
- Source MAC - Identifies who sent the frame
- Data payload - Sized between 46 bytes and 1500 bytes
The connection between the switches can support multiple VLANs. This is called a:
- VLAN trunk
During normal STP operations, which operation does the root switch perform on connected ports?
- Forward
What is the purpose of Ethernet switches?
- To provide efficient transfer of network frames
What are ways switches use lookup tables with connected devices?
- When a device sends a frame, a switch copies the source address to the lookup table and records the port the address is seen on
- As new devices send frames, a switch keeps those devices in the lookup table for a finite period of time
Which of the following components and connectors can be used to build an Ethernet network? (Select all correct answers.)
- NIC
- Switch
- RJ-45
Which type of frame is delivered to a group of specific devices in the local network?
- Multicast
How is port mirroring implemented?
- A switch copies every frame it receives to that port
Your organization is experiencing some slow connections on the network. What could you do to help identify the problem?
- Use a Protocol Analyzer
What switch functionality is characterized by reading a source MAC address and determining where all MAC addresses reside on a switch?
- Learning
How is static VLAN implemented?
- An administrator manually assigns ports to different VLANs
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How does port security help to secure a switch? (Select all correct answers.)
- It turns off unused ports.
- It defines which MAC addresses are associated with each port.
What are features of Ethernet switches?
- Connections between switches are called backbone connections
- Switches that users connect to are called access switches
Why is automatic election of a root switch not always optimal?
- All of the above
Match the following items to either the old standard (802.1d) or the new standard for Rapid Spanning Tree Protocol (802.1w/802.1d)
- Old 802.1d - BPDU frames sent only by root switch , 50 seconds to determine new pathways to root
- New 802.1w/802.1d - Simplified port roles , 3 port states
Where can the OUI (organizationally unique identifier) of a MAC address be found?
- In the first 24 bits of a MAC address
Which type of frame is delivered to a group of specific devices in the local network?
- Multicast
Why would a switch need to use flooding?
- There's no match for a destination address in the lookup table
How does Spanning Tree implement self-healing?
- A link failure causes a blocking port to become a forwarding port
During normal STP operations, which operation does the root switch perform on connected ports?
- Forward
How do VLANs improve performance and security in switched LANs?
- They create independent and separate broadcast domains within a switch.
What is used to identify the VLAN to which a frame being sent to another switch belongs?
- 802.1q tag
You have multiple connections between two switches and find that the spanning three protocols are blocking some of the redundant connections. As a result, only one of those connections is active. Using the link aggregation control protocol will:
- Allow switches to use the multiple connected ports which makes them all active because they recognize they both support LACP.
What best describes priority assignment to VLAN ports?
- A switch administrator assigns time-sensitive traffic a higher priority than other traffic
Once your switch is installed, what additional configurations could be done? Choose all that apply.
- All of the above
What causes broadcast storms?
- The broadcast address is sent when switches are connected using redundant physical links
In spanning tree operations, what timer listens for up to 15 seconds and spends 15 seconds trying to find a new pathway to the root switch?
- Forward delay timer
What is an example of a Layer 2 device?
- Switch
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