TTMER25: Data transmission over access network (ADSL2, ADSL2+, VLAN, WLAN, WAN protocols)
Control questions
You must give an answer to 5 questions at the beginning of the laboratory exercise. One
wrong answer will make the mark given to the measuring with one grade worse. Two or more
wrong answers will result a supplementary measuring!
- What kind of tasks have to be solved on the laboratory exercise?
- Review the main elements of the network used at the measurement, and their main tasks!
- Explain the difference between the ADSL over ISDN and the ADSL over POTS!
- Review the main parameters of the ADSL line layer!
- On what kind of elements of the protocol stack have any effects of the following
parameters: mode (g.dmt, adsl2, auto)?
- On what kind of elements of the protocol stack have any effects of the following
parameters: VPI, VCI?
On which two layers' boundary of the protocol stack can the
procedures of the RFC 1483 be applied?
- In what speed and with what range can the WLAN APs operate? What is the relation between this two issues?
- What are the advantages and drawbacks of WLAN networks compared to the wired networks?
Enumerate 3-3 of the advantages and the drawbacks!
- What kind of frequency range can we use for transmission in case of different WLAN-standards?
- What type of wireless architectures can we distinguish? Characterize them shortly!
- What kind of methods do you know for an access to a common radio medium?
- What is the SS and the BSS? From what can we derive their identifiers (SSID and BSSID)?
- What possibilities do you know according to the protection of WLAN networks against the illegal accesses?
- What do RADIUS, WEP, WPA acronyms mean? What are the weaknesses of the WEP?
- What the MAC ID filtering is used for, and how can it be vulnerable?
- What does it mean, if it is able to operate an ADSL modem as a router, or as a bridge?
- What can a VLAN be used for? Where can we use this technology in the measuring
arrangement? How many parameters can a VLAN-tag contain, and what are they?
- What can a PPP be used for? What kind of services does this protocol have?
- Review the parts of the PPP!
- Review the states of the PPP!
- How can we fit the message packets of the PPP protocol to the ATM AAL5 and Ethernet frames?
- What can the NAT be used for, and where can it be used in the measurement compilation?
- What is the similarity between the ARP and the NAT?
- What can the DHCP be used for, and where can it be used in the measuring arrangement?
- Give an outline review about the operation of the DNS!