Chapter 1

Question 1

What MPLS stands for and what exactly is it?

Answer 1

Multi Protocol Label switching - It is a WAN technology protocol. It can work at the top other protocols in which it creates a virtual point to point link between two remote sites over the MPLS network. When the frame enters the MPLS network, it is tagged with some extra MPLS frame. It can also provide quality of Service for certain type of application data.

Question 2

How do we remember the 7 layers of OSI model?

Answer 2

Please do not through sausage pizza away.

Question 3

What is the functionality of transport layer?

Answer 3

It helps with initiating the connection between 2 devices. It uses the Syn, Sync-Ack, Ack process which is called 3 way handshake.
It also add its transport header to the data that it receives from application layer. Port number is one of the field in transport header.
It also segments the data with sequence numbers and provide data recovery.

Question 4

How many sublayers does data link layer has and what are they?

Answer 4

MAC (Media Access control) and LLC (logical link control)

Question 5

Define the most common types of RG ratings?

Answer 5

RG58 - 50 ohm
RG59 - 75 Ohm
RG6 - 75 Ohm - Most commonly used. It uses a F type connector that screws in.

Question 6

Give the color criteria for TIA/EIA 568 A standard.

Answer 6

It goes from pin 1 to 8. Color coding is following - S/G, Green, S/O, Blue, S/Blue, Orange, S/Brown, brown

Question 7

Give the color criteria for TIA / EIA 568 B standard.

Answer 7

S/Orange, Orange, S/Green, Blue, S/Blue, Green, S/Brown, Brown

Question 8

What Cat rating cable does 10BaseT uses?

Answer 8

It can use CAT 3 cabling or better like Cat5, Cat5e and so on

Question 9

What Cat rating cable does 100BaseT uses?

Answer 9

It can use CAT 5e cabling or better

Question 10

What Cat rating cable does 1000BaseT uses?

Answer 10

It can use CAT 6 cabling or better

Question 11

What Cat rating cable does 10GBaseT uses?

Answer 11

It can use CAT 6a cabling or CAT 7 which has all its wires in it that are shielded.

Question 12

What fiber optic cabling consists of?

Answer 12

It has its core at the centre. Then comes the cladding part that reflects the light back to the core part. And then comes the cable Jacket.

Question 13

What are the common colors that multimode and single mode fiber comes in?

Answer 13

Multimode - It usually comes in orange.
Single mode - It usually comes in Yellow.

Question 14

What are the common types of fiber cable connectors?

Answer 14

SC, ST, FC, LC, MT-RJ

Question 15

Describe SC connector.

Answer 15

It is an square connector which we just punch in and punch out.

Question 16

Describe ST connector.

Answer 16

It a round connector. It uses F type connector that we insert and twist.

Question 17

Describe FC fiber cable connector.

Answer 17

It is also a round connector. It uses a connector that we insert and screws in =.

Question 18

Describe LC and MT-RJ fiber cable connector.

Answer 18

Both of these connectors are Small Form Factor. Both the receiving and sending part / wire are located in one condensed connector.

Question 19

What are the common contacts types of Fiber optic cables?

Answer 19

PC (Physical contact), APC (Angled physical contact), UPC (Ultra Physical contact)

Question 20

What are different types of cables in terms of fire rating?

Answer 20

PVC (Poly vinyl cable), Riser cable (That run between floors), Plenum cable

Question 21

What kind of cable connector and language serial cables use?

Answer 21

RS232 language and DB9 connector.

Question 22

Where do we use rollover cable (It is different from crossover) and what is its wiring pinout?

Answer 22

We use rollover cable to connect RS232 cable (DB connector) to a route console port. On one end wire pinouts 1, 2, 3, 4, 5, 6, 7, 8 connects to wiring pinout 8, 7, 6, 5, 4, 3, 2, 1

Question 23

Define ethernet frame and their field sizes.

Answer 23

Pre-able (3 bytes), SFD (Start Frame delimited) (1 Byte), DA, SA, Type (2 Bytes), Data, FCS (4 bytes)

Question 24

What is the value of type field for IPv4 packet in Ethernet header?

Answer 24

0x0800

Question 25

What is the value of type field for IPv6 packet in Ethernet header?

Answer 25

0x86DD

Question 26

Define 10BaseT and 10BaseFL.

Answer 26

10BaseT ->
10BaseFL -> Uses multimode fiber and can support a length of 500 m to 2000m.

Question 27

Define 100BaseT and 100 BaseFX

Answer 27

It uses multi mode fiber and can support distances up to 2000 m.

Question 28

Define 1000BaseT, 1000BaseSX and 1000BaseLX

Answer 28

1000BaseT
1000BaseSX ->Supports a distance of upto 550 m and uses multimode fiber.
1000BaseLX - Uses SSF. Distances upto 2000 m

Question 29

Define 10GBaseT, 10GBaseSR,10GBaseLR and 10GBaseER

Answer 29

10GBaseSR - Uses MMF, Supports distances up to 300 m, uses a 950nm wave length signal

10GBaseLR - Uses SSF, Supports distances upto 10 km, uses 1310 nm wavelength

10GBaseER - Uses SSF, Supports distances up to 40 KM, Uses 1550 nm wavelength

Question 30

Define 10GBaseSW and 10GBaseLW

Answer 30

10GBaseSW - It is a WAN standard as denoted by SW. Uses multi mode and supports distances up to 300 m and uses 850 nm wavelength

10GBaseLW - It is a WAN standard. Uses SSF. Distance - up tp 10 KM.