Import Ant NetWorkIng QuEstiOnS Part 1

1. What are 10Base2, 10Base5 and 10BaseT Ethernet LAN s

10Base2—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that uses base band

signaling, with a contiguous cable segment length of 100 meters and a maximum of 2 segments.

10Base5—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that uses base band

signaling, with 5 continuous segments not exceeding 100 meters per segment.

10BaseT—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that uses base band signaling and twisted pair cabling.

2. What is the difference between an unspecified passive open and a fully specified passive open

An unspecified passive open has the server waiting for a connection request from a client. A fully specified passive open has the server waiting for a connection from a specific client.

3. Explain the function of Transmission Control Block

A TCB is a complex data structure that contains a considerable amount of information about each connection.

4. What is a Management Information Base (MIB)

A Management Information Base is part of every SN MP managed device. Each SN MP agent has the MIB database that contains information about the device's status, its performance, connections, and configuration. The MIB is queried by SN MP.

5. What is anonymous FTP and why would you use it

Anonymous FTP enables users to connect to a host without using a valid login and password. Usually, anonymous FTP uses a login called anonymous or guest, with the password usually requesting the user's ID for tracking purposes only. Anonymous FTP is used to enable a large number of users to access files on the host without having to go to the trouble of setting up login for them all. Anonymous FTP systems usually have strict controls over the areas an anonymous user can access.

6. What is a pseudo tty

A pseudo tty or false terminal enables external machines to connect through Telnet or r login  Without a pseudo tty, no connection can take place.

7. Which layer of the 7 layer model provides services to the Application layer over the Session layer connection?

Presentation.

8. What does the Mount protocol do ?

The Mount protocol returns a file handle and the name of the file system in which a requested file resides. The message is sent to the client from the server after reception of a client's request.

9. What is External Data Representation

External Data Representation is a method of encoding data within an RPC message, used to ensure that the data is not system-dependent.

10. Which OSI Reference Layer controls application to application communication?

Session

11. BOOT P helps a disk less workstation boot. How does it get a message to the network looking for its IP address and the location of its operating system boot files ?

BOOT P sends a UDP message with a sub network broadcast address and waits for a reply from a server that gives it the IP address. The same message might contain the

name of the machine that has the boot files on it. If the boot image location is not specified, the workstation sends another UDP message to query the server.

12. What is a DNS resource record

A resource record is an entry in a name server's database. There are several types of resource records used, including name-to-address resolution information. Resource records are maintained as ASCII files.

13. What protocol is used by DNS name servers

DNS uses UDP for communication between servers. It is a better choice than TCP because of the improved speed a connection less protocol offers. Of course, transmission reliability suffers with UDP.

14. What is the difference between interior and exterior neighbor gateways

Interior gateways connect LAN s of one organization, whereas exterior gateways connect the organization to the outside world.

15. What is the HELLO protocol used for

The HELLO protocol uses time instead of distance to determine optimal routing. It is an alternative to the Routing Information Protocol.

16. What are the advantages and disadvantages of the three types of routing tables

The three types of routing tables are fixed, dynamic, and fixed central. The fixed table must be manually modified every

time there is a change. A dynamic table changes its information based on network traffic, reducing the amount of manual maintenance. A fixed central table lets a manager

modify only one table, which is then read by other devices. The fixed central table reduces the need to update each machine's table, as with the fixed table. Usually a

dynamic table causes the fewest problems for a network administrator, although the table's contents can change without the administrator being aware of the change

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17. What is a characteristic of Store and Forward switches?

They read the entire frame and check CRC before forwarding.

18. What is source route

It is a sequence of IP addresses identifying the route a data gram must follow. A source route may optionally be included in an IP data gram header.

19. What is RIP (Routing Information Protocol)

It is a simple protocol used to exchange information between the routers.

20. What is SLIP (Serial Line Interface Protocol)

It is a very simple protocol used for transmission of IP data grams across a serial line.

Second Part of These is coming soon.