Describe in detail, the components of a networking and switching subsystem of a GSM PLMN. Your answer should include how these components interact within the subsystem

Describe in detail, the components of a networking and switching subsystem of a GSM PLMN. Your answer should include how these components interact within the subsystem

1- Describe in detail, the components of a networking and switching subsystem of a GSM
PLMN. Your answer should include how these components interact within the subsystem.
2- Outline the information flow and communications process involved when a fixed-line
the subscriber calls a mobile phone. Your answer should include unique identifiers used in the
GSM infrastructure
3- Explain the significance of cluster reuse when working with channel borrowing.
4- Explain in detail, what is meant by hard and soft handover in a GSM/UMTS network
5- Explain in detail, how roaming is handled between cells when assisted by the mobile
6- In GSM, Cells are organized into Hierarchies to ensure better coverage and usage of
frequencies. Describe the 3 cell hierarchies referred to above.
7- Initial GPRS access requires an SSGN and a PDP address Describe, using diagrams, how mobile
terminals send and receive data in a GPRS network.
8- Explain, using diagrams, how GSM uses TDMA and FDMA to generate channels.
9- In GPRS, Describe how each mobile station is uniquely identified in the network.
10- Explain how 3G UMTS is able to handle voice and data on its network.
11- Explain how GSM uses multiplexing to generate channels, to facilitate calls for mobile users.
12- What is the impact of channel Borrowing on Cluster Reuse in GSM cells.
13- Compare the current technologies working at “3G and “3.5G” mobile data communication,
on the GSM platform.
14- Explain in detail the relevance of the IMSI on GSM SIM?
15- Explain in detail, is the purpose of the CCCH in GSM infrastructure.
16- What identity is displayed on a mobile device by typing *06#?
What is this identity’s purpose in a GSM environment?
17- Describe in detail two other GSM identities used by mobile devices. Your answer should
detail their role in making calls and roaming
18- Explain the pros and cons of a 7-cell cluster and a 9-cell cluster in GSM. Use diagrams to
illustrate your answer.

1- How does IPv6 represent leading 0’s and the loopback address?
2- Moving from IPv4 to IPv6 required certain transitional techniques. Describe in detail 2
methods used to transition from IPv4 to IPv6
3- Differentiate between Link-Local and Global IPv6 addresses on a router’s interface.
4- Explain how a MAC address is used to construct a modified EUI-64 IPv6 address.

5- Create a Manual Tunnel with RIP on the above configuration Show all code for R1 and R2
6- PC1 is attached to Fa0/0 on R1 and PC2 is connected to Fa0/0 on R2 PC1 has a MAC address
2190:562c:9F60 and PC2 has MAC address 0010:34AD:20FE. What IPv6 address will be
assigned to both PC1 and PC2?
7- List 2 methods of automatic IPv6 Tunnelling.
8- Assume the link between the serial interfaces uses Frame-Relay DLCI 102. Configure both R1
and R2 with relevant IPv6 Frame-Relay code.

1- What is the max sliding window of the HDLC Protocol, if the control field is 1 byte or 2 bytes? (explain
your answer)
2- Briefly describe two methods that PPP uses for authentication?

3- The above diagram shows two routers communicating using PPP. Using a common password
Cisco2012, write separate configurations for the two encapsulation methods described in Part (2)
above, for both routers
4- HDLC defines three types of frames for transmission Describe these 3 frame types.
5- Explain how to ASK, FSK, and PSK are used to transmit binary information.
6- what is the impact on transmission is an HDLC control field is increased from 1 byte to 2 bytes?
Explain your answer.

Network Network

1- Explain what PVC and SVC mean in an ATM environment.
2- What is the function of the CS and SAR sub-layers?
3- How does the ATM NNI cell header facilitate communications and switching in an ATM
network? Your answer should identify the components and functions of the cell header.
4- Explain the function of the CLP bit in the ATM cell header.
5- What impact of using VBR on Voice traffic?
6- Explain the structure and purpose of the AAL and ATM layers of the ATM model.
7- ATM uses alternative bit rates depending on QoS. Comment on the above statement, using
diagrams if necessary, explain how bit rates impact QoS.
8- List 2 benefits of using ATM’S cell format for data communication.
9- What communications function is provided by the CLP bit in the ATM cell header.
10- Compare the CLP bit in the ATM cell header with the DE bit in the frame-Relay LAPF frame
11- How do FECN and BECN provide link management in Frame-Relay.
12- ‘keepalives’ are part of the LMI function in frame-Relay.
Explain what the above statement means.
13- Compare and contrast MPLS and IPSec over a WAN.
14- “The NA-1A-T3/E3 ATM module supports VBR-nrt, VBR-rt, ABR, UBR, and CBR service classes.
For each class, this module support parameters PCR, SCR, MBS, and MCR”.
Write a paragraph on the above statement making reference to the classes and parameters
listed above.
15- What is the impact on voice services in an organization if a core network device is configured
as VBR only?
16- Explain the structure and purpose of the AAL within the ATM model.
17- Describe the role of the Payload type field in the ATM header. Give examples of types and their
18- What would the following bitstream from an ATM header represent?
0000 00000010 0000000000001111 001 1111111
19- Explain the purpose of an FRF.8 Internetwork function.
20- Explain what is meant by the term QoS.

1- What destination addresses are used by a machine when looking for a DHCP Server?
2- What are the specific messages sent, during a DHCP transaction, between a computer
system and a DHCP server?
3- Refer to the diagram below. Configure R1 as a DHCP server for PC1 and PC2, reserving
192.168.X.1 to 192.168.X.9
4- Refer to the diagram below. Assuming there is a serial interface with IP;
configure the router with NAT overload
5- Refer to the diagram below, write an Access control list to allow both PCs to be able to ping
each other, while denying them Telnet capabilities to the router only, but allowing all other
traffic to and from the PCs.

6- Describe in detail, with the aid of diagrams, message format, and sequence associated with
the DHCP communications Process.
7- A Cisco router connects to LAN through its FastEthernet0/0. The router acts as a
DHCP server issuing IPs to clients when they startup. Address is excluded
from the DHCP process. “Configure the router for the above scenario.
8- Routers do not by default forward Layer 2 broadcast address such as DHCP. In the above
scenario, what extra configuration would be required, if this forwarding was required?

Frame Relay
WAN Technologies


Academic LevelCollege (3-4 years: Junior, Senior)
Subject AreaCommunications
Paper Type Research Paper
Number of Pages2 Page(s)/1100 words
Paper FormatMLA
SpacingSingle spaced
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