Google IT Support Professional:The Bits and Bytes of Computer Networking (Week 2) The Network Layer.

 

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★The Network Layer★

Q1.Nice job! ARP is used to discover what MAC address is associated with a specific IP address.

ARP stands for ______.

1. Anonymous Resource Protocol
2. Augmented Resolution Picture
3. Address Resolution Protocol
4. Aggressive Resource Protection

ARP is used to discover what MAC address is associated with a specific IP address.

Q3.RFC stands for ______.

1. Routing Frequency Control
2. Request For Comments
3. Realtime Frame Check
4. Redundant Frame Controller

RFCs have long been used to help establish agreed-upon standards and protocols.

Q4.Anges of IP addresses that anyone can use for their internal networks are known as ______.

1. Subnet Masks
2. Demarcation Points
3. Autonomous Systems
4. Nonroutable Address Space

Non-routable address space can be used by anyone.

Q5.In binary, 1 +1 = _____.

1. 2
2. 10
3. 1
4. 0

Binary addition is just like decimal addition, except you only have two numerals instead of ten.

Q6.A single octet in an IP address represents what range of decimal numbers?

1. 0-250
2. 0-255
3. 0-155
4. 1-255

Eight bits of data, or a single octet, can represent all decimal numbers from 0-255.

Q7.What protocol communicates data between routers representing the edges of autonomous systems?

1. Distance-vector
2. Exterior gateway
3. Link state
4. Interior gateway

Q8.How many bits long is an IP address?

1. 256 bits
2. 64 bits
3. 8 bits
4. 32 bits

IP addresses are 32-bit-long numbers made up of four octets, and each octet is normally described in decimal numbers.

Q9.Which is a valid IP address?

1. 126.396.659.100
2. 598.36.789
3. 128.42.64.78
4. A8:97:4F:6D:H6:0F

128.42.64.78 has the correct notation and does not containany numbers that can't be represented by a single octet.

Q10.Which IP address is Class C?

1. 224.24.45.69
2. 128.42.39.72
3. 132.26.144.52
4. 192.37.48.98

Class C addresses begin with a first octet value of 192 through 223.

Q11.What protocol is used to discover the hardware address of a node with a certain IP address?

1. Subnet mask
2. ARP table
3. SQL database
4. CIDR, or Classless Inter-Domain Routing

An ARP table is just a list of IP addresses and the MAC addresses associated with them.

Q12.What is the process of taking a large network and splitting it up into many individual and smaller subnetworks called?

1. Cloud computing
2. Dynamic Host Configuration Protocol (DHCP)
3. Clustering
4. Subnetting

Subnetting is the process of taking a large network and splitting it up into many individual and smaller subnetworks, or subnets.

Q13.What is the maximum decimal number possible to represent with 16 bits?

1. 65536
2. 256
3. 1600
4. 16

If you have a 16-bit number, you can just perform the math 2^16 which would be 65536 numbers.

Q14.Computer A wants to send some data to computer B. Computer A knows that Computer B is not on its local network, so it sends the packet to the router between Network A and Network B. Based on how many network hops have happened, how much will the TTL field be decremented by?

1. 2
2. 6
3. 1 
4. 8

Q15.What type of network address space allows for nodes on a network to communicate with each other, but prevents any gateway router from forwarding traffic there, and are reserved for internal networks?

1. MAC address
2. IP address
3. Subnet mask
4. Non-routable address space

Non-routable address space allows for nodes on such a network to communicate with each other, but no gateway router will attempt to forward traffic to this type of network.

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