Module 5 / Unit 4 Installing WAN Links Flashcards
On completion of this unit, you will be able to: □ Understand the provision of telecoms networks and the Internet. □ Identify technologies used to implement WANs and Wireless WANs. □ Install and configure dial-up and broadband modems / multifunction network devices and components for WAN links. □ Summarize technologies that provide IoT connectivity.
What is the main advantage of circuit switched networks?
They can provide a guaranteed level of bandwidth.
What is an Internet Exchange Point?
A data center and network access point where several ISPs interconnect their networks to save costs.
What bandwidth are T1 and E1 links and why are they different?
T1s are 1.544 Mbps and E1s are 2.048 Mbps; E-carrier uses 30 channels compared to T-carrier’s 24.
Which 10GbE Ethernet and SONET standards are interoperable?
The 10GbE WAN PHY (10GBASE-SW, -LW, and -EW) are interoperable with OC-192.
What is the upper limit of a dialup modem’s connection speed?
56 Kbps for the downlink and 33.3 Kbps for the uplink. A 48 Kbps uplink is possible with V.92 but only by reducing the downlink rate.
What function does a smart jack serve?
A smart jack is a means of terminating a T1 digital leased line. The smart jack typically provides a loopback facility for the access provider to test the line.
Why would you use a T1 extender?
If Customer Premises Equipment (CPE) cannot be installed at the minimum point of entry, it may be necessary to extend the T1 leased line to another point in the premises. This can be achieved using an extender or a line driver.
What place does VDSL have in terms of access to public networks?
Very High Bitrate DSL (VDSL) supports high data rates over a limited distance. In this respect, it supports Fiber to the Curb (providing the final link from the fiber distribution frame to customer premises).
What standard(s) are intended to support 4G mobile wireless services?
Long Term Evolution (LTE) and LTE Advanced (LTE-A).
Assuming that sufficient bandwidth can be provided, what factor limits the usefulness of a microwave satellite internet link?
The link will be subject to high latency, which will impact real-time data services.
What type of network topology is used by IoT technologies such as ANT+ and Z-Wave?
Mesh topology.
What is a principal requirement of IoT technologies, as demonstrated by the latest version of Bluetooth?
Low power consumption.
