NETWORK ROUTING PRINCIPLES LESSON 5

Which layer defines the end-to-end connections and reliability?

Transport

True or False ? To obtain one or a set of IP addresses, you must lease them from the Internet Assigned Numbers Authority (IANA).

True

True or False? Addresses must be set for computers, routers, switches, and IP phones for these devices to operate on networks.

True

True or False? As with public IP addresses, no two domain names may be identical.

True

When performing a domain name system (DNS) search, what are two popular services that benefit from DNS?

Web and email are two popular services that benefit from DNS or any networking protocol that needs to translate a human-readable name to an IP address.

What is the classful netmask for 10101101?

255.255.0.0

At work, Emily's laptop is assigned the Internet protocol (IP) address 192.10.10.10. When Emily takes the computer home, the laptop is assigned the IP address of 192.168.100.25. Whether at work or at home, what is the classful netmask assigned to her network interface card?

255.255.255.0

Bruce purchased a replacement router/firewall combination machine to replace the old one he inherited from the previous network administrator. The old router used decimal notation for masks. The new router uses Classless Inter-Domain Routing (CIDR) notation for masks. Which of the following decimal to CIDR notations are not valid?

255.255.255.0 to /32

Paula is dividing her home network into two smaller networks. Given the fact she is using the 192.168.100.0 network, which of the following subnet masks will supply the division she seeks?

255.255.255.128

What is the decimal equivalent of the binary number 00111001?

57

ECN (Explicit Congestion Notification)

A 2-bit field that offers end-to-end network congestion notification between network devices to reduce packet loss.

Flags

A 3-bit field controls fragmentation. Bit 0 is reserved and must be set to zero. Bit 1 instructs that a packet not be fragmented. Bit 2 indicates more fragments are coming.

Destination Address

A 32-bit field that contains the IP address of the receiving host. It does not change as the packets traverse the network, unless the datagram passed through a network address translation (NAT) device.

IHL (Internet Header Length)

A 4-bit field counts the number of 32-bit words in the header.

Which class of network will have a range of 256 Internet protocol (IP) addresses with the 0 address being the name of the network and the 255 address being the broadcast address?

A Class C network will have 256 Internet protocol (IP) address in the range with the 0 address being the name of the network and the 255 address being the broadcast address.

Identification

A16-bit field that tags a group of IP packet fragments. Each datagram must have a unique identification number so receiving hosts can reassemble the fragmented datagram.

When using a private Class B address only, which addresses can be used?

Addresses from 172.16.0.0 to 172.31.0.0 may be used when using a private Class B address only.

True or False? The dynamic host configuration protocol (DHCP) allows a gateway router or firewall to act as an address converter between public and private Internet protocol (IP) addresses.

False

What converts entire protocol stacks from one protocol type to another between different networks?

An application layer gateway converts entire protocol stacks between diverse networks.

What is an easy method to find out the owner of a specific domain?

An easy method to find out the owner of a specific domain is to use Network Solutions, LLC.

OSI Reference Model

Application, Presentation, Session, Transport, Network, Data Link, Physical

If the Internet protocol (IP) address 192.168.100.0 names the network, what kind of address is 192.168.100.255 for that same network?

Broadcast

What is the purpose of subnetting?

By subnetting, a network administrator may divide a network into smaller equally sized pieces.

Which of the following are true about Internet protocol (IP) and Internet protocol version 4 (IPv4) address structures? Choose all that apply.

Class A has an IP range of 0.0.0.0 through 127.255.255.255. On the Internet, two devices (computers, switches, routers, modems, etc.) cannot be assigned the same IP address. Within the host portion of an IP address, the values 0 and 255 are reserved. An IP address consists of two parts: the network portion and the host portion.

Tom discovers the Internet protocol (IP) address of his computer is 192.10.10.10. What address class does Tom's IP belong to?

Class C

Which of the following fields is not part of the Internet protocol (IP) packet header

Class of Service (COS)

Which of the following are true regarding classful networking and classless inter-domain routing (CIDR)? Choose all that apply.

Classful network architecture IP address allocations are based on octet (8-bit) boundary segments of the 32-bit IP address, forcing either 8-, 16-, or 24-bit network prefixes. The decimal to CIDR notation of 255.0.0.0 to /8 is a valid notation.

__________addresses are 32 bits long.

IPv4

There are greater than 340 trillion -__________ unique addresses.

IPv6

___________uses a much larger address space with 128 bits of hexadecimal numbers versus iPv4's 32 bits.

IPv6

Internet protocol version 6 (IPv6) addresses are hexadecimal, the sections of which are separated by what?

Internet protocol version 6 (IPv6) addresses are separated by colons.

Why is it important to determine the owner of an Internet protocol (IP) address?

Knowing the owner of an IP address makes it possible to determine the owner of a server, which helps technicians tell customers who can perform certain tasks, such as changing DNS records and updating servers.

Frances connects her computer to the company's internal network, but she needs to access a public search engine. What Application Layer (Layer 7) protocol can allow her private Internet protocol (IP) address to connect to a public server?

Network address translation (NAT)

Which of the following allows a gateway router or firewall to act as an address converter between public and private Internet protocol (IP) addresses?

Network address translation (NAT)

Which layer includes the media, signal, and binary transmission?

Physical

In a Class C CIDR Masks Table, which component shows how many Class C Networks can be combined or aggregated?

The Possible Number of Networks shows how many Class C Networks can be combined or aggregated.

What is the decimal equivalent of the binary number 10001000?

The decimal equivalent is 136: 128 + 8 = 136.

What would be the result if network protocols did not exist?

Without network protocols, devices and networks would not communicate with one another. Before layered protocols became the de facto standard, many proprietary monolithic protocols were created by various vendors to enable communications and vendor lock-in.

NAT

allows a gateway router or firewall to act as an address converter between the Internet and the LAN

Private IP addresses are usually behind a firewall or router and are converted to public IP addresses by which service?

by a network address translation (NAT).

Which of the following is a validly formed fully qualified domain name (FQDN)?

jefferson.lib.co.us