Computer Networks Answers

The random waiting time before retransmission after a jamming signal in CSMA/CD is referred as

A cell phone is allocated 642 radio frequencies to operate in a city with a hexagon pattern cell design. 42 of the frequencies is reserved for control channel and each phone cell uses 2 frequencies per call ( 1 for transmitting and 1 for receiving). In an advance mobile phone service, use the frequencies distribution to answer the following question. If the distance between centers of adjacent cells is 2km and the minimum distance between centers of cells with the same cochannel is 7km, calculate

a). cell pattern Reuse factor

b). the area of each cell

c). the radius of each cell

During COVID pandemic lock down, most structured business networks were able to support TCP based traffic services like remote desktop and other messaging services to accommodate telecommunicating or working from home. Which ATM service categories supported those services traffic?

Specify the characteristics of the following popular WLAN transmission methods: a) 802.11 a b) 802.11 b c) 802.11 g d) 802.11 n e) 802.11 ac      

Differentiate between wired networking and wireless networking and critically outline five major advantages and disadvantages of each.

how SAP’s Ariba suite of solutions can aid CQ in managing their relationship with the overseas suppliers.

Briefly describe any five types of Network/ Cyberattacks faced by individuals and organisations around the world, and provide recommendations on how to prevent each of the attacks discussed

A user’s laptop is shutting down unexpectedly. As a Network Technician, you discovered the “shutdowns” only happen when the laptop is moved from one room to another. You “reseat” the hard drive, memory, battery, and LCD cable, but the laptop continues to shut down.

Explain what could be the cause of this issue, and how would you resolve it.

 Network configurations

1. Receive internet access from the WAN

2. Provide internet access to devices connecting to AP that is connected to the ubuntu 

server

3. Block/Allow IP/MAC address

2. Configurations can be altered/configured programmatically

1. SSID of the external AP

2. Can be password protected or Open Security

3. Network interfaces so we can choose what will be the LAN and the WAN

4. Set DHCP configuration for the clients that will be connecting to the LAN (ex. IP pool 

range)

5. Allow/Block clients to internet access

3. Captive portal functionality

1. Authorized/Unauthorized client identification

2. Allowing/denying of client programmatically

3. Sending request to external web app

4. Receiving response/request from external web app

4. Documentation or simple guide for each configuration, how to install them, their location, 

meaning of parameters