11,12

What kind of network is the PSTN?

Circuit-switched

Which type of disaster recovery site contains all the equipment you would need to get up and running again after a disaster, and yet would require several weeks to implement?

Cold Site

What type of network combines fiber with coax?

HFC (hybrid fiber coaxial)

When shopping for a new router, what does the MTBF tell you?

How long devices like this one will last on average until the next failure

What is the lowest layer of the OSI model at which LANs and WANs support the same protocols?

Layer 3

______________ in SONET are analogous to the ________________ of T-carriers.

OC levels, digital signal levels

Which power backup method will continually provide power to a server if the power goes out during a thunderstorm?

Online UPS

What kind of device can monitor a connection at the demarc but cannot interpret data?

Smart jack

What method does a GSM network use to separate data on a channel?

TDMA (Time-division multiple access)

Which ISDN channel carries signaling information?

The Bearer channel (or B channel)

While troubleshooting a recurring problem on your network, you will want to examine the TCP messages being exchanged between a server and a client. Which tool should you use?

WireShark

What is the maximum capacity of a T1 line?

1.544 Mbps

How many channels are in an ISDN PRI connection?

23B+D

How large is an ATM cell?

53 bytes

What device must be installed on a DSL network to protect the sound quality of phone calls?

A splitter

What information is typically included in a Layer 1 frame?

A start symbol or short preamble, a length field, the Layer 2 payload, and possibly a marker to end the frame

What specifications define the standards for cable broadband?

DOCSIS

What field in an IPv4 packet is altered to prioritize video streaming traffic over web surfing traffic?

Diffserv

What port do SNMP agents listen on?

Port 161

Which protocol can provide VoIP services over a Metro Ethernet connection?

SIP (Session Initiation Protocol)

One of your coworkers downloaded several, very large video files for a special project she's working on for a new client. When you run your network monitor later this afternoon, what list will your coworker's computer likely show up on?

Top Listener

Your roommate has been hogging the bandwidth on your router lately. What feature should you configure on the router to limit the amount of bandwidth his computer can utilize at any one time?

Traffic shaping

Which DSL standard has the fastest speeds immediately outside the CO?

VDSL

An organization can lease a private _________________ that is not shared with other users, or a _________________ that can be physically configured over shared lines in the carrier's cloud.

dedicated line, virtual circuit

What are three examples of Layer 2 LAN or PAN standards that also function at Layer 1?

Answers may vary. Examples might include Ethernet, USB, Wi-Fi, and Bluetooth.

What are two types of virtual circuits?

PVC (permanent virtual circuit) and SVC (switched virtual circuit)

What command requests the next record in an SNMP log?

SNMP Get Next

What two types of modulation does DSL use to carry data?

Amplitude & phase modulation

Where does an MPLS label go in a PDU?

Between Layers 2 and 3

Which of the following features of a network connection between a switch and server is not improved by link aggregation?

Speed