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CYBR 235 > Content Quiz 3 > Flashcards

Content Quiz 3 Flashcards

1
Q

What does an Ethernet switch use to make forwarding decisions

A

MAC address table

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2
Q

Convert 0x0A into binary

A

00001010

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3
Q

How are MAC addresses generally expressed?

A

12 Hex Values

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4
Q

What is meant by Switch Learning?

A

The switch learns MAC addresses and associates them with Port numbers.

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5
Q

What is the third section of the Ethernet frame and how big is it?

A

FCS, 4bytes

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6
Q

What is the primary advantage of Store-and-Forward switching?

A

Error Checking

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7
Q

Ethernet broadcast frames are sent to which switch ports?

A

All switch ports

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8
Q

How many bits in a MAC address?

A

48

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9
Q

If a destination MAC has an OUI of 01-00-5E-01-01-C9, what does this indicate?

A

It is a multicast frame

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10
Q

What are the primary types of Frame Forwarding

A

Fragment free
Store and Forward
Fast forward

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11
Q

What is the OUI?

A

Organizationally Unique Identifier

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12
Q

What is the typical cut-through method of switching?

A

Fast forward

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13
Q

If an Ethernet switch cannot find a match for the destination MAC address of a frame, what will it do?

A

Forward out all ports, except the incoming port

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14
Q

How big is the OUI?

A

3 bytes

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15
Q

Switch Learning is used to build what data structure?

A

Mac address table

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16
Q

What are the Data Link Layer sublayers?

A

Mac
LLC

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17
Q

Data Encapsulation at L2 includes which of the following?

A

Ethernet Error Detection
Ethernet Addressing
Ethernet Frame

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18
Q

True or False:
A layer 2 Ethernet switch is totally unaware of the data being carried in the data portion of the frame.

A

True

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19
Q

What is the first 8 byte section of the Ethernet frame called?

A

Preamble

20
Q

What is the second section of an ethernet frame?

A

Destination MAC

21
Q

What is the final section of an Ethernet frame and how big is it?

A

FCS, 4bytes

22
Q

An Ethernet broadcast frames use what destination MAC address?

A

FF-FF-FF-FF-FF-FF

23
Q

MAC addresses are divided into two sections. What are they?

A

OUI and Vendor Assigned

24
Q

IP does not worry about creating a connection to the destination before sending a packet. What is this called?

A

Connectionless

25
Q

How many bits in an IPv4 address?

A

32

26
Q

What command is used to shoe route sources on a Cisco router?

A

show ip route

27
Q

For a default gateway to serve a LAN, what must be true?

A

It must have an IP address in the LAN

28
Q

Directly Connected routes are?

A

Automatically added

29
Q

What is Fragmentation?

A

When L3 splits an IPV4 packet

30
Q

Best effort indicates that IP will not guarantee what?

A

Delivery of the packet

31
Q

What is the first byte of ALL IP headers?

A

Version

32
Q

What is TTL measured in?

A

Hops

33
Q

What does the Protocol section of an IPv4 Header Reference?

A

The layer 4 protocol of the packet

34
Q

What is the primary benefit of IPv6?

A

Increased address space

35
Q

What are the basic operations of the network layer?

A

Encapsulation
Addressing end devices
Routing
De-encapsulation

36
Q

What are the limitations of IPv4?

A

Lack of end to end connectivity
Complexity
Address depletion

37
Q

What are the types of routes in a router’s routing table?

A

Remote
Default Route
Directly Connected

38
Q

What is meant by the statement, “IP is unreliable”?

A

It cannot realign packet sequence
It cannot fix corrupt packets
I cannot retransmit

39
Q

Where can a host send packets?

A

Locally
Itself
Remote Addresses

40
Q

How many bits in an IPv6 address?

A

128

41
Q

Which address comes first in an IP header?

A

Source

42
Q

If the destination IP address is outside the LAN, what device is responsible for sending the packet to the gateway?

A

The host

43
Q

Remote Traffic is always forwarded where?

A

The default gateway

44
Q

What is the default route?

A

Where all unmatched traffic is forwarded

45
Q

What are the two versions of the Internet Protocol?

A

v4 and v6

CYBR 235 (5 decks)

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