1. A technician is attempting to explain broadband technology to a customer. Which two descriptions or examples should be used to educate the customer? (Choose two.)
- includes dialup connections using POTS
- incompatible with multiplexing
- uses a wide band of frequencies
- offers sustained speeds of 128K or more
- requires line-of-sight connection with service provider
2. When accommodating a teleworker, which type of connection should be used when mobile access during traveling is required and broadband options are unavailable?
- residential cable
- DSL
- dialup
- satellite
Explanation: With a maximum speed of 56 kbps (actual speed of 53 kbps), dialup connections are not considered a broadband technology like DSL, cable, satellite, and broadband wireless.
3. When comparing DOCSIS and Euro-DOCSIS, what is the primary difference between the two specifications?
- flow control mechanisms
- maximum data rates
- access methods
- channel bandwidths
Explanation: Euro-DOCSIS is adapted for use in Europe. The main differences between DOCSIS and Euro-DOCSIS relate to channel bandwidths.
4. If asked to describe DSL technology, which three statements would help the user develop a better understanding of the technology? (Choose three.)
- DSL is available in any location that has a telephone.
- ADSL typically has a higher download bandwidth than available upload bandwidth.
- In home installations, a splitter separates the ADSL and voice signals at the NID, allowing multiple ADSL outlets in the house.
- DSL speeds can exceed the speeds available with a typical T1 line.
- Transfer rates vary by the length of the local loop.
- All varieties of DSL provide the same bandwidth, although they use different technologies to achieve upload and download.
Explanation: The different varieties of DSL provide different bandwidths, some with capabilities exceeding those of a T1 or E1 leased line. Within the variety of DSL, transfer rates are less as the distance from the central office decreases. ADSL is asymmetric DSL, which provides higher download bandwidth than upload bandwidth.
5. In a DSL installation, which two devices are installed at the customer site? (Choose two.)
- CM
- DOCSIS
- DSLAM
- Microfilter
- DSL transceiver
Explanation: The customer site may include devices such as a microfilter and a DSL transceiver, which usually is a DSL modem.
6. Refer to the exhibit. On the basis of the network topology shown, which devices or software applications provide encapsulation and encryption for the VPN traffic?
- VPN client software installed on the machines of the users at the Regional Office only
- PIX appliances at the Corporate Network and Regional Office only
- router and PIX appliance at the Corporate Network and the routers and PIX appliance at all remote locations
- LAN switches and routers at the remote locations only
- routers and PIX appliance at the remote locations only
Explanation: Figure shows the regional offices with routers and PIX firewall devices. The corporate office includes a router and a PIX firewall. The PIX firewall could also be replaced by a VPN concentrator.
7. Which two techniques can be used to secure the traffic sent over a VPN connection? (Choose two.)
- data labeling used to mark and separate the VPN traffic for different customers
- data encapsulation used to transmit data transparently from network to network through a shared network infrastructure
- data encryption used to code data into a different format using a secret key
- use of a second routing protocol to transport the traffic over the VPN tunnel
- use of a dedicated connection over the company private leased line
Explanation: VPNs secure data by encapsulating, creating a tunnel, or encrypting the data. Most VPNs can do both.
8. Match the description on the left with the corresponding VPN characteristic on the right.
Answer
9. Which is an example of a tunneling protocol developed by Cisco?
- AES
- DES
- RSA
- ESP
- GRE
Explanation: GRE is a tunneling protocol developed by Cisco Systems. It can encapsulate a variety of Layer 3 packets inside IP tunnels, creating a virtual point-to-point link to Cisco routers at remote points over an IP internetwork.
10. Drag the description on the left to the corresponding type of tunneling protocol on the right.
Answer
11. Drag the description on the left to the correct algorithm on the right.
Answer
12. What type of connection is the most cost effective to adequately support SOHO teleworker access to the Internet?
- direct T1 link to the Internet
- 56k dialup
- one-way multicast satellite Internet system
- DSL to an ISP
Explanation: Given these choices, DSL is the most cost-effective method for broadband teleworker access to the Internet. Cable is another cost-effective technology that competes with DSL. Broadband wireless and two-way satellite Internet are becoming more common and more competitive.
13. Which wireless standard operates in both licensed and unlicensed bands of the spectrum from 2 to 6 GHz and allows for transmission rates of 70 Mbps at a range of up to 50 kilometers?
- 802.11g
- 802.11n
- 802.11b
- 802.16
- 802.11e
Explanation: The 802.16 (or WiMAX) standard allows transmissions up to 70 Mbps. 802.16 has a range of up to 30 miles (50 km). It can operate inlicensed or unlicensed bands of the spectrum from 2 to 6 GHz.
14. What is typically deployed to support high-speed transmissions of data to SOHO cable modems?
- hybrid fiber-coaxial (HFC)
- high speed dialup cable modems
- broadband copper coaxial
- 1000baseTX
Explanation: Cable operators typically deploy HFC networks to enable high-speed transmission of data to cable modems located in a SOHO. The trunks typically are fiber with coaxial distribution cable to the homes (feeders).