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Advanced Networking > Test 2 > Flashcards

Test 2 Flashcards

1
Q 
Network.host.host.host
Network.network.host.host
Network.network.network.host
Multicast
Research
A

Class :

A
B
C
D
E
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2
Q

is the defacto protocol used within the Internet

A

The Internet Protocol (IP)

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3
Q

All other Internet layer protocols exist to serve:

A

IP

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4
Q

How many bytes does an IP address have?

A

20 bytes

24 bytes with options

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5
Q

IP packets have how many fields?

A

12

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6
Q

Internet protocol has used what version?

A 
Version(4bits)
Version number (0100 for IPv4)
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7
Q

IP header length is:

A

4 bits

Length of header in 42-bit words

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8
Q

IP total length:

A

16 bits

Length of packet (header and data) in bytes

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9
Q

How many bits it Time To Live?

A

8 bits

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10
Q

Essentially a hop count value. When value reaches zero, packet is discarded

A

Time To Live

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11
Q

How many bits are in protocol:

A

8 bits

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12
Q

Similar to DoD Host-To-Host layer’s port number.

This number represent the DoD Host-To-Host layer protocol to which this packet should be directed

A

Protocol

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13
Q

The portion of an IPv4 address that represents the network within which hosts reside.

A

Network IP Address

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14
Q

The IP address used by hosts to send a packet to all devices on a network

A

Broadcast IP Address

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15
Q

What address represents all networks. Also called a Layer 3 broadcast:

A

255.255.255.255

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16
Q

What’s the Broadcast IP Address for 192.168.24.0:

A

192.168.24.255

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17
Q

Also called Hierarchical IP Addressing Scheme
32 bit IPv4 addresses
Dotted Quad notation A.B.C.D , where A, , B C and D represent 8- bit binary numbers
Five classes of IPv4 addresses: A - E

A

Classfull IP Addressing Scheme

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18
Q 
What is class A range for the 1st octet?
Which ones are reserved?
A

1-126

Reserved: 0 and 127

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19
Q

What is class B range for the 1st octet?

A

128-191

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20
Q

What is class C range for the 1st octet?

A

192-223

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21
Q

Class A, B and C IP Addresses are referred to as:

A

Unicast IP Address

22
Q

Unicast IP address a single IP address associated with a:

A

MAC address

23
Q

What is class D range for the 1st octet?

A

224-239

24
Q

A single host transmits packets with a _______ address

Multiple hosts can receive this packets as long as they want to accept packets with that specific _______ address

A

multicast

25
Q

What is class E (reserved) range for the 1st octet?

A

240-255

26
Q

Reserved IPv4 address.

Means “this network or segment”

A

address 0.0.0.0

27
Q

Reserved IPv4 address.

Loop back address. Used for testing if network interface is active.

A

127.0.0.1-127.255.255.255

28
Q

Reserved IPv4 Address.

Means “all networks”

A

255.255.255.255

29
Q

You may use _______________ when the number of devices in your organization is larger than the number of IPv4 addresses assigned to your organization by the Internet Corporation for Assigned Names and Numbers ( ICANN )

A

private IPv4 addresses

30
Q

Private Class A

A

10.0.0.0 -10.255.255.255

31
Q

Private Class B

A

172.16.0.0 - 172.31.255.255

32
Q

Private Class C

A

192.168.0.0 - 192.168.255.255

33
Q

is a unique local area network in which one or more computing devices reside.

A

Broadcast domain

34
Q

is also known as a subnet, or subnetwork , or a network

A

broadcast domain

35
Q

We know that we should create more broadcast domains by …

A

Activating the all of the ports on the routers within our internetwork

OR

Purchasing more routers for our internetwork

36
Q

To create these “baskets” we must:

A

subnet blocks of IP addresses that have been assigned to our organization

37
Q

Here a broadcast domain is the same as …

A
  • Subnet
  • Subnetwork
  • Network
38
Q

Each broadcast domain will be assigned the following IP addresses:

A

Network IP address

Broadcast IP address

39
Q

Used to uniquely identify the broadcast domain

A

Network IP address

40
Q

Used by any device that resides within the broadcast domains to broadcast IP packets to all devices that reside within the same broadcast domain .

A

Broadcast IP Address

41
Q

Range of assignable IP addresses includes …

A

1st assignable IP address

Last assignable IP address

42
Q

4 questions to answer when subnetting:

A
  1. How many broadcast domains do we require?
    OR
  2. How many devices reside within each broadcast domain?
  3. What subnet mask IP address will be assigned to all devices within a broadcast domain?
  4. What are the network address numbers for the octets in which you are subnetting?
  5. For each broadcast domain created, define the following
    - Network IP address
    - Broadcast IP address
    - 1st assignable IP address
    - Last assignable IP address
43
Q

We can borrow zero, one, two, three, four, five, or six bits from the 4th octet to create:

A

broadcast domains

44
Q

When creating broadcast domains we cannot borrow _____ bits, or _____ bits.

A

Seven

Eight

45
Q

What’s the formula to determine broadcast domains we must borrow.

A

2^(Number of bits borrowed)

46
Q

What subnet mask IP address will be assigned to all devices within a broadcast domain?

A

The default subnet mask IP address for class C IP networks is 255.255.255.0 Since we are not borrowing any bits from the 4th octet to create broadcast domains , the subnet mask IP address we will used is 255.255.255.0

47
Q

What’s wrong if you were assigned a range of Class C IP addresses (i.e. an IP address block), then you would be able to create one (1) subnet (i.e. broadcast domain with 254 hosts residing within the subnet

A

You place al of your eggs (computing devices) in one basket, so to say

48
Q

How do we create more subnets?

-That is, more broadcast domains?

A

Subnetting

49
Q

represents the number of IP addresses within subnet

A

Block size

50
Q

Why can’t we borrow 7 or 8 bits for the 4th octet?

A

After borrowing 7 bits to represent broadcast domains, one (1) bit remains to represent the IP addresses for computing devices that will reside in the 128 broadcast domains .

Would leave 2 IP addresses for 7

This leaves no remaining IP addresses to assign computing devices.

51
Q

Why is Creating one broadcast domain with 65, 534 hosts, though possible, not particularly desirable !

A

Many eggs (computing devices) in one basket! If one computing device’s NIC fails and created a broadcast storm, then the entire network is unusable.

Advanced Networking (2 decks)

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