CCNA Jeremy Day 2

What is the name of the connector on the end of an Ethernet UTP cable?

RJ45

How many pins are in an RJ45 connector?

8

How many bits are in 1 byte?

8

Network speeds are measured in [...] per second.

bits

How many bits are in 1 kilobit?

1,000 (one thousand)

How many bits are in 1 megabit?

1,000,000 (1 million)

How many bits are in 1 gigabit?

1,000,000,000 (1 billion)

How many bits are in 1 terabit?

1,000,000,000,000 (1 trillion)

Ethernet was originally defined in the IEEE [...] standard in 1983.

802

What is the maximum length of an Ethernet UTP cable?

100 meters

What is the speed of an 'Ethernet' connection?

10 Mbps

What is the speed of a 'FastEthernet' connection?

100 Mbps

What is the speed of a 'Gigabit Ethernet' connection?

1 Gbps

What is the speed of a '10 Gig Ethernet' connection?

10 Gbps

IEEE standard [...] = 10 Mbps Ethernet (10BASE-T)

802.3i

IEEE standard [...] = 100 Mbps Ethernet (100BASE-T)

802.3u

IEEE standard [...] = 1 Gbps Ethernet (1000BASE-T)

802.3ab

IEEE standard [...] = 10 Gbps Ethernet (10GBASE-T)

802.3an

What does UTP stand for?

Unshielded Twisted Pair

Why are the wire pairs in a UTP cable twisted together?

It protects against EMI (Electromagnetic Interference)

How many pairs of wires are used in a 10BASE-T cable?

2 (=4 wires)

How many pairs of wires are used in a 100BASE-T cable?

2 (=4 wires)

How many pairs of wires are used in a 1000BASE-T cable?

4 (=8 wires)

How many pairs of wires are used in a 10GBASE-T cable?

4 (=8 wires)

A [...] connection allows both devices to send and receive data at the same time.

full-duplex

In a FastEthernet connection, a router transmits data on which pins [...]

1 and 2

In a FastEthernet connection, a router receives data on which pins [...]

3 and 6

In a FastEthernet connection, a firewall transmits data on which pins [...]

1 and 2

In a FastEthernet connection, a firewall receives data on which pins [...]

3 and 6

In a FastEthernet connection, a PC transmits data on which pins [...]

1 and 2

In a FastEthernet connection, a PC receives data on which pins [...]

3 and 6

In a FastEthernet connection, a switch transmits data on which pins [...]

3 and 6

In a FastEthernet connection, a switch receives data on which pins [...]

1 and 2

If Auto MDI-X is disabled, what kind of UTP cable should be used to connect a router and a switch?

straight-through cable

If Auto MDI-X is disabled, what kind of UTP cable should be used to connect a PC and a switch?

straight-through cable

If Auto MDI-X is disabled, what kind of UTP cable should be used to connect two routers together?

crossover cable

If Auto MDI-X is disabled, what kind of UTP cable should be used to connect two switches together?

crossover cable

What kind of cable connects a pin pair on one end of a UTP cable to the same pair on the other end?

straight-through cable

What kind of cable connects a pin pair on one end of a UTP cable to the opposite pair on the other end?

crossover cable

What is the name of the feature that allows a device to automatically adjust which RJ45 pin pairs it uses to transmit and receive data?

Auto MDI-X

Which two pin pairs are used in a 10BASE-T or 100BASE-T connection?

Pair 1-2, Pair3-6

Which four pin pairs are used in a 1000BASE-T or 10GBASE-T connection?

Pair 1-2, Pair 3-6, Pair 4-5, pair 7-8

Fiber-Optic cables are connected to [...] transceivers in a router or switch.

SFP (Small Form-Factor Pluggable)

What are the two main kinds of fiber-optic cable?

Single-mode and multimode

Multimode Fiber cables have a [...] fiberglass core than single-mode fiber cables.

wider

[...] fiber cables allow multiple angles (modes) of light waves to enter the fiberglass core.

Multimode

Which allows longer cables, single-mode or multimode fiber?

single-mode

Which is cheaper, single-mode or multimode fiber?

multimode

In [...] fiber cables, light travels straight through the fiberglass core at a single angle.

single-mode

10GBASE-SR, 10GBASE-LR, and 10GBASE-ER were defined in the IEEE [...] standard.

802.3ae

1000BASE-LX was defined in the IEEE [...] standard.

802.3z

1000BASE-LX maximum cable length:

550 meters (multimode) 5 kilometers (single-mode)

10GBASE-SR maximum cable length:

400 meters

10GBASE-LR maximum cable length:

10 kilometers

10GBASE-ER maximum cable length:

30 kilometers

[...] cables emit a faint signal outside of the cable, which can be detected and copied.

UTP

[...] cables are vulnerable to EMI (electromagnetic interference).

UTP