Network + Cybrary I

Your company operates a fleet of panel trucks, each with a built-in cellular base station for voice and data communications. You are required to upgrade the wireless equipment used in 18 vehicles. You do not want to install obsolete equipment. Which of the following cellular technologies is most likely to be obsolete?

• EDGE

• TDMA

• CDMA

• GSM

• LTE

As a network administrator, you decide to replace a hub on your network with an active hub. At which OSI layer does the new device function?

• Session

• Transport

• Network

• Physical

You decide to install an 802.11a wireless network in your company's main building. Which frequency band is used in this network?

• 900 MHz

• 5 GHz

• 2.4 GHz

• 2.9 GHz

You need to implement Spanning Tree Protocol (STP) to prevent network loops when more than one path can be used. Which two devices could you deploy? (Choose two.)

• bridges

• hubs

• routers

• switches

Which media-access method does the 802.11 standard specify for wireless networks?

• Demand priority

• Token-passing

• CSMA/CA

• CSMA/CD

During a recent network redesign meeting, one team member suggested that you implement a device that operates at both the Data Link layer and the Network layer of the OSI model. Which device operates at both of these layers?

• a brouter

• a router

• a repeater

• a hub

• a bridge

Your company's WAN connects networks in New York, Atlanta, Dallas, and Boston. Each city is directly connected to every other city. Which physical topology is used for your WAN?

• Bus

• Mesh

• Star

• Ring

Which open standard creates a redundancy group to share an IP address?

• CARP

• NAT

• HSRP

• LACP

Your company is located in Charlotte, North Carolina. Management has decided to deploy multiple 802.11a WLANs. You are concerned that there are not enough non-overlapping channels to support the number of access points that you need to deploy. How many non-overlapping channels are supported in this deployment?

• eight

• four

• three

• eleven

• ten

Your company is located in Atlanta, Georgia. Management has decided to deploy multiple 802.11b WLANs. You are concerned that there are not enough non-overlapping channels to support the number of access points that you need to deploy. How many non-overlapping channels are supported in this deployment?

• three

• five

• eleven

• eight