Content: Network Design and the Access Layer

The process of prepending protocol information with information from another protocol is called:

• Framing

• Encapsulation

• Encoding

• Packetizing

Answer explanation

Encapsulation is the process of prepending protocol information with information from another protocol.

When an Ethernet frame is sent out an interface, the destination MAC address indicates:

• The MAC Address of the device, which is on this network, that will receive the Ethernet frame

• The MAC address of the NIC card of a device, which is on this network or another network, that will receive the Ethernet frame

• The MAC address of the NIC card that sent the Ethernet frame

• The MAC address of the router

Answer explanation

When an Ethernet frame is sent out an interface, the Destination MAC address indicates the MAC address of the device, which is on this network, that will receive the Ethernet frame.

Which Ethernet frame field indicates the beginning of an Ethernet frame?

• Type/Length

• Destination MAC Address

• FCS

• Preamble and SFD

Answer explanation

The Preamble and Start Frame Delimiter (SFD) indicate the beginning of an Ethernet frame

The Ethernet protocol is at what layer of the OSI Model?

• Layer 1 Physical

• Layer 2 Data Link

• Layer 3 Network

• Layer 4 Transport

Answer explanation

Ethernet operates at layer 2, the data link layer, of the OSI model.

An IP address is considered what type of address

• Physical

• Logical

Answer explanation

An IP address is a logical address.

An Ethernet MAC address is considered what type of address:

• Physical

• Logical

Answer explanation

An Ethernet MAC address is a physical address.

Which address does not change when a device is connected to a new network?

• Physical

• Logical

Answer explanation

The physical address does not change when the device is connected to a new network.

Which portion of an IP address uniquely identifies that device on that network?

• Physical

• Logical

• Network

• Host

Answer explanation

The host portion of an IP address uniquely identifies that device on that network.

Which design layer provides connectivity to devices on an Ethernet LAN?

• Core

• Distribution

• Access

• Physical

Answer explanation

The access layer provides connectivity to devices on an Ethernet LAN

Which two devices would commonly be found at the access layer of the hierarchical enterprise LAN design model? (Choose two.)

• Layer 3 device

• Layer 2 Switch

• Firewall

• Modular Switch

• access point

Answer explanation

While some designs do route at the access layer, the two devices that should always be placed at the access layer of the hierarchical design model are an access point and a Layer 2 switch. A modular switch is commonly used at the core layer. Routing by a Layer 3 device is commonly used in the distribution layer. The firewall is a device in the Internet edge network design.