Feature that fiber devices use to achieve high throughput by carrying multiple signals on one line. (pg. 451)

A. Synchronous Digital Hierarchy (SDH)

B. dense wavelength division multiplexing (DWDM)

C. Synchronous Optical Network (SONET)

D. bidirectional wavelength division multiplexing (BWDM)

B. or D. DWDM is the newer version of of BWDM that has supplanted it. DWDM enables an individual single-mode fiber to carry multiple signals by giving each signal a different wavelength (using different colors of laser light).

SONET and SDH are two names for the same technology used for handling the interconnections of long-distance routers.

What are the benefits to using coarse wavelength division multiplexing (CWDM) instead of dense wavelength division multiplexing (DWDM) cabling? (pg. 452)

A. It's less subject to noise interference.

B. It's more cost-efficient.

C. It can carry more signals on a line, offering higher throughput.

D. It works better for distances longer than 60 km.

B. CWDM is used in higher-end LANs with 10GBASE-LX4 networks where its lower cost offers benefits.

DWDM is the fiber standard that works better for distances longer than 60 kilometers.

Dedicated, private connections that organizations can use instead of the Internet to secure network connections (pg. 452).

A. leased lines

B. metro Ethernet

C. MPLS

D. SD-WAN

A. Leased lines , or private WANs, are expensive-but-ideal for many businesses because they enable them to secure network communication with no fear of hackers accessing network resources.

Metro Ethernet, MPLS and SD-WAN are all different types of private WANs

A private network that provides a platform-agnostic labeling system to greatly improve performance compared to an IP network (pg. 452).

A. MPLS

B. SD-WAN

C. metro Ethernet

D. DWDM

A. MPLS-capable routers avoid running IP packets through their full routing tables and instead use the header information to route packets quickly.

SD-WAN enables traffic over the Internet that incorporates a lof of the features of MPLS.

Metro Ethernet creates a private network within a city using fiber-optic cabling.

Dense wavelength division multiplexing (DWDM) is a feature of fiber optic cabling.

A ___ network creates a secure, private network within a city, connecting offices and individuals and provides Internet connectivity. (pg. 455)

A. SD-WAN

B. metro Ethernet

C. MPSL

D. DSL

B. Metro Ethernet uses fiber-optic cabling and Ethernet technology to create a metropolitan area network (MAN) that does not use the Internet to connect and thus doesn't require security.

SD-WAN relies on virtualization software instead of fiber hardware (the "SD" stands for "software-defined).

MPSL is a technology for speeding up network connections.

DSL is provided by ISPs to individual customers and businesses for direct connections to the Internet.

A high speed Internet connection technology that uses a regular telephone line for connectivity (pg. 456).

A. DWDM

B. ISDN

C. DSL

D. CWDM

C. Digital Subscriber Line (DSL) uses the same telephone lines and RJ-11 jacks as any regular phone line. The two most important versions to know are symmetric DSL (SDSL) and asymmetric DSL (ADSL).

DWDM and CWDM are advanced features on fiber devices.

ISDN is a older technology that transmits voice and data over telephone lines.

What is the difference between SDSL and ADSL? (pg. 456)

A. Multiple devices can utilize an SDSL connection at the same time, but an ADSL connection only supports one at a time.

B. When multiple devices are on the same ADSL connection, throughput is prioritized based on factors. With SDSL, throughput is distributed equally.

C. ADSL connections can't send and receive packets at the same time, but SDSL can.

D. SDSL provides equal upload and download speeds, but ASDL uses different upload and download speeds.

D. SDSL provides equal speeds up to 15 Mbps, while ADSL uses different upload speeds up to 1 Mbps and download speeds up to 15 Mbps.

An early type of DSL connection that made the DSL line function the same as if you snapped the Ethernet cable into your NIC. (pg. 458)

A. PPPoE

B. ADSL

C. bridged connection

D. SDSL

C. A bridged connection doesn't allow DSL providers to control or monitor who has access to a a DSL modem, so they transitioned to PPPoE to give them stronger controls over the connection.

ADSL and SDSL are two of the most well known versions of DSL that effect upload and download speeds.

The standard protocol used by cable modem networks to facilitate data transfer faster. (pg. 460)

A. PPPoE

B. DOCSIS

C. SONET

D. metro Ethernet

B. The current specification for Data Over Cable Service Interface Specification (DOCSIS) is DOCSIS 4.0.

Point-to-Point over Ethernet (PPPoE) is the dominant standard for DSL today.

SONET is the primary standard for fiber-optic cable carriers.

Metro Ethernet is used to create secure, private networks within a city over fiber-optic cabling.

A fiber architecture that uses a single fiber to the neighborhood switch and then individual fiber runs to each final destination. (pg. 461)

A. GSM

B. WDM

C. PON

D. DOCSIS

C. Passive optical network (PON) uses wavelength division multiplexing (WDM) to enable multiple signals to travel on the same fiber and then passively splits the signal at the switch to send traffic to its proper recipient.

GSM is a group of network technologies for mobile devices.

DOCSIS is a protocol for cable modems.

The 4G technology that now dominates wireless services today. (pg. 464)

A. SIM

B. HSPA+

C. LTE

D. GSM

C. LTE networks feature speeds up to 300 Mbps download and 75 Mbps upload. All LTE services use SIM cards.

GSM and HSPA+ are respectively 2G and 3G standards, but LTE is 4G.

The majority of smartphones today use a(n) ___ that enables access to cellular networks and stores other pertinent information. (pg. 463)

A. SIM card

B. LTE NIC

C. TDMA

D. EDGE

A. The SIM card identifies the phone and carries over the phone number to a new device as well.

An LTE NIC allows a device without an LTE radio to connect to a cellular network.

TDMA and EDGE are outdated mobile technologies that have largely been replaced by newer technologies like LTE.

A connection on a faraway computer that enables you to control that computer as if you were sitting in front of it. (pg. 466)

A. proxy server

B. VPN

C. Remote Desktop Connection

D. remote terminal

D. remote terminal

Proxy servers and VPNs are useful tools for getting resources from the Internet or private networks, but they don't necessarily establish control of a remote computer.

Remote Desktop Connection is the official remote terminal from Microsoft.

A network configuration that enables a remote user to access a private network via the Internet. (pg. 470)

A. remote terminal

B. SSH

C. proxy server

D. VPN

D. Virtual private networks (VPNs) employ an encryption methodology called tunneling, which protects the data from being visible.

A remote terminal establishes direct control over a single device, but doesn't necessarily give the same access as a VPN. SSH is a remote terminal application.

A proxy server retrieves resources on behalf of a client instead of establishing a connection between the client and network.

Type of VPN connection where a single computer logs into a remote network as if it were a member of that network. (pg. 474)

A. host-to-site

B. full tunnel

C. split tunnel

D. site-to-site

A. host-to-site

A site-to-site connection is between to LANs.

Tunnel connections are about how much the connections are split between the VPN and the local NIC, not the scope of devices connecting to a network.

A VPN connection using two VPN concentrators to connect two separate LANs permanently. (pg. 475)

A. site-to-site

B. clientless

C. gateway-to-gateway

D. full tunnel

A. A site-to-site VPN connection enables two LANs to function as a single network, sharing files and services as if in the same building.

Clientless VPN clients connect to the VPN server using a browser that doesn't require specific software.

A site-to-site connection can be a full tunnel VPN, which encapsulates every connection for more security than a split tunnel connection.

Match the VPN type with the function. (pg. 475-476)

1. clientless

2. split tunnel

3. DMVPN

4. full tunnel

5. DTLS

A. Creates a secure connection to a remote network but leaves Internet access to the local connection.

B. Enables direct VPN connections between multiple locations.

C. Every connection goes through the remote connection for better security.

D.Connects to the VPN server using a standard browser.

E. Optimizes connections for applications like voice and video.

1 = D

2 = A

3 = B

4 = C

5 = E