Term
| Cable uses what type of signal to across the network |
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Definition
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Term
On the electromagnetic spectrum what are the frequencies of the following two items --
Downstream cable
Upstream cable |
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Definition
Downstream 50 to 860 Mhz
Upstream 5 to 43 Mhz |
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Term
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Definition
| Data-over-Cable service Interface Specification -- international standard developed by CableLabs. Certifies cable equipment devices. |
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Term
| Voice communication over a local loop requires how much bandwidth? |
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Definition
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Term
| DSL uses what bandwidth range? |
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Definition
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Term
| The connection between the DSL provider's central office and the customer can be called two names..... |
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Definition
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Term
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Definition
| DSL access multiplier -- combines individual DSL connections from users into one high-capacity link to an ISP |
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Term
| What advantage does DSL have over cable technology? |
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Definition
| It is not a shared medium. Each user has a separate direct connection to the DSLAM. |
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Term
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Definition
| A passive low-pass filter with two ends. |
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Term
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Definition
| Separates DSL traffic from the POTS traffic. Allows only 0 to 4 kHz frequencies to pass to or from the telephone. |
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Term
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Definition
| Network interface device located at customer premises at the demarcation point. The point where the phone line enters the customer premises. |
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Term
| What are satellite upload and download speeds? |
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Definition
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Term
| How many communication channels can one satellite serve simultaneously? |
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Definition
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Term
| 802.11n uses what technology to reach speeds of up to 300Mbps? |
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Definition
| MIMO -- Multiple-input multiple-output .. It optimizes the use of bouncing signals. |
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Term
| 802.11n uses what technology to reach speeds of up to 300Mbps? |
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Definition
| MIMO -- Multiple-input multiple-output .. It optimizes the use of bouncing signals. |
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Term
| List three carrier protocols for transferring data. |
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Definition
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Term
| List 5 encapsulation protocols. |
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Definition
GRE - Generic Route Encapsulation
IPsec
L2F
PPTP
L2TP |
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Term
| What size key does DES use? |
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Definition
| Data Encryption Standard -- 56-bit key |
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Term
| What advantage does AES encryption have over DES? |
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Definition
| Stronger security and computationally more efficient. 128,192 and 256 bit keys |
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Term
| What are the characteristics of RSA encryption? |
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Definition
| Asymemetric key -- 512,768,1024 and larger keys. |
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Term
| What is the difference between symmetric and asymmetric encryption? |
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Definition
| Symmetric encryption uses the same key in both directions. Asymmetric encryption uses different keys in each direction. |
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Term
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Definition
| Number generated from a string of text with a formula. When sending a secure message with a hash it is created on one side and compared on the other. If the two hashes match then the data was not altered. |
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Term
| What is Diffie Hellman encryption |
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Definition
| Allows the use of Shared secret key used by encryption and hash algorithms ... DES or MD5 over insecure communications channel. |
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Term
| what is the IPsec framework? |
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Definition
The IPsec framework has four squares into which the administrator chooses properties of each part.
1. IPsec Protocol -- ESP, ESP+AH, AH
2. Encryption -- DES, 3DES, AES
3. Authentication -- MD5, SHA
4. Diffie-Hellman group - DH1, DH2, DH5 |
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Term
| When comparing DOCSIS and Euro-DOCSIS, what is the primary difference between the two specifications? |
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Definition
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Term
T or F
DSL speed can exceed the speed available with a typical T1 line. |
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Definition
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Term
| Which two techniques can be used to secure the traffic sent over a VPN connection? |
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Definition
| Data encapsulation and data encryption |
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Term
| What is an example of a tunneling protocol developed by Cisco? |
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Definition
| GRE - Generic Route Encapsulation |
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Term
| What is the passenger protocol? |
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Definition
| The protocol over which the original data was being carried. IE IPX, AppleTalk, IPv4, IPv6 |
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Term
| Which wireless standard operates in both licensed and unlicensed bands of the spectrum from 2 to 6GHz. |
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Definition
| 802.16 WiMAX up to 70 Mbps and 50 kilometers |
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Term
| What are the two types of VPN's? |
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Definition
| Site-to-Site and remote access |
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