Tuesday, March 1, 2016

Networking Questions 2016 - Part2

Another half a dozen random networking posers to get you thinking, have fun :-)

1. Lets start simple, What is port 23 used for?

A) FTP data
B) FTP program
C) Telnet

2. What is true about the MAC address?

A) Used to identify networks
B) Defined at the Network layer
C) Unique for every networked device in the world
D) Identical to the IP address

3. In a local broadcast all bits set to 1 are received by all hosts on local and remote broadcast domains?

A) True
B) False

4. IGRP advertises routes to interior, system and exterior routes

A) True
B) False

5. What is the correct sequence of Spanning Tree states?

A) Blocking, Listening, Learning, Forwarding, Disabled
B) Disabled, Blocking, Listening, Learning, Forwarding
C) Learning, Listening, Forwarding, Disabled, Blocking
D) Listening, Learning, Forwarding, Blocking, Disabled

6. What do asymmetric switches require?

A) memory buffers
B) extra ports
C) statically assigned ports only
D) high speed CAM


1.  Answer C

The Telnet is a TCP/IP protocol which defines a text based communications session between a client and a host using TCP port number 23.

2. Answer C

MAC addresses are assigned by the manufacturer of a network interface card (NIC) and are stored in its hardware. A MAC address contains the manufacturer's identification number.
The MAC address may also be referred to as the burned-in address, hardware address, Ethernet address or physical address and is part of the Data Link layer, specifically the Media Access Control sub-layer of the Data Link layer.


3. Answer B

Routers don't forward broadcasts so local broadcasts will stay on the broadcast domain from which they originated.

 4. Answer A

IGRP advertises three types of routes:

Interior routes are routes between subnets in the network attached to a router interface.
System routes are routes to networks within an autonomous system.
Exterior routes are routes to networks outside the autonomous system.

 5.  Answer A

STP switch port states:


A switch does not enter any of these port states immediately except the blocking state. When the Spanning Tree Protocol (STP) is enabled, every switch in the network starts in the blocking state and later changes to the listening and learning states.

6. Answer A

With ability for support of high bandwidth ports Asymmetric Switches require more Buffer memory for storing and forwarding of packets for fast processing.

Progressively harder ?? stay tuned for more  
- thank you.

A good teacher can inspire hope, ignite the imagination, and instill a love of learning.

― Brad Henry