Which role does the spanning tree protocol play when interconnecting LAN switches/bridges?
What will be an ideal response?
The Spanning Tree Algorithm designates a loop-free subset of the network's topology by placing those bridge ports that, if active, would create loops into a standby (blocking) condition. Blocking bridge ports can be activated in the event of a primary link failure, providing a new path through the internet work. The STA uses a conclusion from graph theory as a basis for constructing a loop-free subset of the network's topology.
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Snort works in one of three modes. Which of the following is not one of these modes?
A) Sniffer B) Analyzer C) Packet logger D) Network intrusion-detection
Formulate the following SQL statements:
The relational schema shown below is part of a hospital database. The primary keys are highlighted in bold. Patient (patientNo, patName, patAddr, DOB) Ward (wardNo, wardName, wardType, noOfBeds) Contains (patientNo, wardNo, admissionDate) Drug (drugNo, drugName, costPerUnit) Prescribed (patientNo, drugNo, unitsPerDay, startDate, finishDate) (1) List all the patients’ details, alphabetically by name. (2) List all the patients contained in the ‘Surgical’ ward. (3) List all the patients admitted today. (4) Find the names of all the patients being prescribed ‘Morphine’. (5) What is the total cost of Morphine supplied to a patient called ‘John Smith’ ? (6) What is the maximum, minimum and average number of beds in a ward? Create appropriate column headings for the results table. (7) For each ward that admitted more than 10 patients today, list the ward number, ward type and number of beds in each ward. (8) List the numbers and names of all patients and the drugNo and number of units of their medication. The list should also include the details of patients that are not prescribed medication.