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engineering
telecommunication engineering

Questions and Answers of Telecommunication Engineering

What are the four possible requirements for inelastic traffic?
What is the purpose of a DS codepoint?
List and briefly explain the five main functions of DS traffic conditioning.
What is an autonomous system?
List and briefly explain the three main functions of BGP.
Define quality of service (QoS).
Provide the following parameter values for each of the network classes A, B, and C. Be sure to consider any special or reserved addresses in your calculations. a. Number of bits in network portion of
Using your IP address and your mask, what is your network address? This is determined by converting the IP address and the mask to binary and then proceeding with a bitwise logical AND operation. For
Why does a differentiated services (DS) domain consist of a set of contiguous routers? How are the boundary node routers different from the interior node routers in a DS domain?
What percentage of the total IP address space does each of the network classes represent?
If an IPv4 address is given out every tenth of a second, how many years until all the IPv4 addresses are exhausted? If an IPv6 address is given out every second, how many years until all the IPv6
Find out about your network. Using the command "ipconfig," "ifconfig," or "winipcfg," we can learn not only our IP address but other network parameters as well. Can you determine your mask, gateway,
What are the differences between multimode and single-mode propagation?
What are the characteristics of structured cabling systems?
List and briefly define the services provided by LLC.
List and briefly define the types of operation provided by the LLC protocol.
List some basic functions performed at the MAC layer.
Differentiate between guided media and unguided media.
Describe the components of optical fiber cable.
The semiconductor industry requires a large degree of automation in the processing of microelectronics devices. This is primarily due to the fact that extremely small tolerances are required in the
Some organizations are implementing wide area networks as a high-speed backbone in order to increase communication efficiency and effectiveness of services throughout a particular region. One such
Use Wireshark to capture packets on your network. Do some screen captures that illustrate the contents of Ethernet LLC PDUs and MAC frames.
What are the transmission medium options for Gigabit Ethernet?
What are the transmission medium options for 10-Gbps Ethernet?
What are the characteristics of virtual local area networks (VLANs)?
What is power over Ethernet (PoE)?
Why is PoE increasingly popular in business networks?
Explain why data rates of 100 Mbps, 1 Gbps, and 10 Gbps are increasingly common in business networks.
What is CSMA/CD? How does it operate?
What functions are performed by a bridge?
What is the difference between a store-and-forward switch and a cut-through switch?
What are the differences between a bridge and a switch?
What is the difference between a layer 2 switch and a layer 3 switch?
Determine the type of network interface card installed in your computer? Describe this card's major properties including its speed(s), layer 2 protocol, and the type of medium used to connect to the
Using capture programs such as Wireshark and built-in programs like ping, nslookup, and ipconfig, find and capture screen shots showing the following information: a. Your computer's MAC address
Use Wireshark to capture frames transmitted by your computer. Explore one or more of the captured frames to a level that illustrates destination and source MAC addresses. Does your MAC address match
An argument that has been ongoing for some time now involves the question as to whether ATM or Gigabit Ethernet is the best choice for a high-speed networking solution. Do some Internet research that
List and briefly define four application areas of WLANs.
In general terms, what application areas are supported by Bluetooth?
What is the difference between a core specification and a profile specification?
List and briefly define key requirements for WLANs.
What is the difference between a single-cell and a multiple-cell WLAN?
List and briefly define IEEE 802.11 services.
How is the concept of an association related to that of mobility?
What are the advantages of VoIP?
Briefly describe the role of SIP and SDP in VoIP applications.
Identify and briefly describe the major characteristics and components of presence services.
What are the four generic architectural components of a public communications network? Define each term.
Explain the difference between datagram and virtual circuit operation.
What are some of the limitations of using a circuit-switching network for data transmission?
What is a value-added network (VAN)?
Consider a simple telephone network consisting of two end offices and one intermediate switch with a 1-MHz full-duplex trunk between each end office and the intermediate switch. The average telephone
Consider a packet-switching network of N nodes, connected by the following topologies:a. Star: One central node with no attached station; all other nodes attach to the central node.b. Loop: Each node
List and briefly define ATM non-real-time services.
What are the characteristics of MPLS networks?
Briefly describe the role of a forwarding equivalence class (FEC) in MPLS.
What are the characteristics of MPLS VPNs?
What are the characteristics of wide area Ethernet networks?
How does frame relay differ from packet switching?
What are the relative advantages and disadvantages of frame relay compared to packet switching?
How is congestion control handled in a frame relay network?
How does ATM differ from frame relay?
What is the difference between a virtual channel and a virtual path?
List and briefly define ATM real-time services.
Consider the following situations. In each case indicate whether you would use frame relay, ATM, MPLS, or Carrier Ethernet services. Assume that the facilities are available and "competitively"
Do some Internet research to identify some of the major vendors of MPLS service providers. The Web site www.mplsprovider.com/mpls-service-provider.asp may be helpful in your search for information.
When doing Internet research on MPLS and Ethernet, you are likely to encounter discussions of virtual local area networks (VLANs). Do some Internet research on VLANs and how they are used in business
What are the major characteristics of fourth-generation (4G) networks?
Identify and briefly describe the key components of satellite communication systems.
Explain what GEOSs, LEOSs, and MEOSs are (including what the acronyms stand for). Compare the three types with respect to factors such as size and shape of orbits, signal power, frequency reuse,
Identify how organizations use GEOS, LEOS, and MEOS, respectively.
Identify and briefly describe the characteristics and uses of VSAT systems.
What is the principle of frequency reuse in the context of a cellular network? Why is frequency reuse important?
What are the differences between control channels and traffic channels in cellular networks?
Describe what is meant by the term multiple access as it applies to cellular communication.
Identify the most prevalent multiple access methods deployed in today's cellular networks.
Briefly explain the principle behind CDMA.
What are the major characteristics of third-generation (3G) networks?
Describe a sequence of events similar to that of Figure 17.5 fora. A call from a mobile unit to a fixed subscriberb. A call from a fixed subscriber to a mobile unit
Do some Internet research on the Mobile Web. Locate information that compares the Mobile Web to traditional Internet resources. Identify examples of Mobile Web applications that are especially
Do some Internet research to locate information comparing cellular network systems and services in the United States to those in other highly developed nations around the world. How does the United
Do some Internet research on business use of VSAT systems. Locate information relevant to the types of applications that businesses are likely to support via VSAT systems and the costs of VSAT
What is the difference between passive and active security threats?
List and briefly define three intruder behavior patterns.
What is the role of encryption in the operation of a virus?
In general terms, how does a worm propagate?
Consider an automated tell machine (ATM) in which users provide a personal identification number (PIN) and a card for account access. Give examples of confidentiality, integrity, and availability
Repeat Problem 18.1 for a telephone switching system that routes calls through a switching network based on the telephone number requested by the caller. Problem 18.1 Consider an automated tell
Consider a desktop publishing system used to produce documents for various organizations. a. Give an example of a type of publication for which confidentiality of the stored data is the most
For each of the following assets, assign a low, moderate, or high impact level for the loss of confidentiality, availability, and integrity, respectively. Justify your answers.a. An organization
Assume that passwords are selected from four-character combinations of 26 alphabetic characters. Assume that an adversary is able to attempt passwords at a rate of one per second. a. Assuming no
The question arises as to whether it is possible to develop a program that can analyze a piece of software to determine if it is a virus. Consider that we have a program D that is supposed to be able
The point of this problem is to demonstrate the type of puzzles that must be solved in the design of malicious code and, therefore, the type of mindset that one wishing to counter such attacks must
What are some weaknesses of a packet-filtering router?
What is the difference between a packet-filtering router and a stateful inspection firewall?
How does behavior-blocking software work?
What protocols comprise SSL?
What services are provided by the SSL Record Protocol?
Explain the difference between anomaly intrusion detection and signature intrusion detection.
List three design goals for a firewall.

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