Networking Ch 7 - Switching and Routing

A communication device that connects other network devices and receives and forwards data to a specified destination within a LAN.

• Switch

• Hub

• Router

• VLAN

A unique identifier given to every device that connects to a network and is comprised of a 48-bit number separated into six 2-byte numbers.

• IP Address

• MAC Address

• Network Routing Number (NRN)

• SSID

Answer explanation

MAC addresses are unique to each network interface card NIC).

This allows any device to connect to more than one network, or one network more than once.

A MAC address is like a house number on a street or an apartment number in a building. Each number uniquely identifies a home.

Which feature below is NOT associated with unmanaged switches?

• Can connect easily to devices and is ready to use without configuration.

• Is fast, less expensive, and can connect to all the devices in a small area like a home or small office.

• Connects Ethernet devices with a fixed configuration that cannot be altered.

• Has a web-based or command-line interface for configuration.

Answer explanation

Unmanaged switches cannot be configured.

Which feature(s) below describe a managed switch?

• Supports link aggregation, which is the ability to combine multiple switch ports in parallel to increase available bandwidth.

• Has a web-based or command-line interface for configuration.

• Allows port configuration for port security.

• All choices describe a managed switch

Answer explanation

Another feature is that managed switches allow VLAN creation for segmentation.

What OSI layers do network switchers operate on?

• 2

• 3

• Both 2 and 3

• Neither 2 nor 3

Answer explanation

There are two types of switches, Layer 2 (data link) and Layer 3 (network).

Layer 3 switches support all of the features of a layer 2 switch plus the ability to do limited routing. Layer 3 switches usually operate on layer 3.

Note that frames and packets are used to encapsulate data at these levels.

The ability to process MAC and LLC information are critical to the operation of switches.

What two features are crucial to the operation of switches?

• The ability to process MAC information

• The ability to process LLC information

• The ability to route data

• The ability to convert analog signals to digital

Answer explanation

Routing data is what routers do.

Converting analog to digital (and vice versa) is what modems do.

While a layer 3 switch can do limited routing, it is not crucial to the operation of a switch.

What is NOT a type of Ethernet connection cable for network devices?

• Straight-through

• Crossover

• Rollover

• Coax

Answer explanation

Coax cables typically connect cable networks and homes. It does not connect network devices and almost never uses Ethernet.

Which of the following is required to establish a new network switch and configure its IP address for the first time?

• In-band management

• Out-of-band management

• Site-to-site VPN

• Client-to-site VPN

Answer explanation

Out-of-band management is required when you establish a new network switch and configure its IP address for the first time.

A client-to-site VPN is a connection where remote clients connect to the server through the internet and to a LAN behind a server.

In-band management can only be used after the switch has been configured with an IP address and authentication information through out-of-band management.

A site-to-site VPN is a connection between networks that creates a secure link through VPN gateways.

A port configuration that allows multiple VLANs to connect through a single port and is also known as a tagged port.

• Trunk

• Aggregator

• Access

• Stem

What are two common functions of a VLAN?

• Separate voice and data traffic

• Provide encryption and authentication

• Physically segment and manage networks

• Connect a WAN or MAN to a LAN.