The Bits and Bytes of Computer Networking. Week 6: Troubleshooting and the Future of Networking

The IPv6 loopback address is _____.

0000:0000:0000:0000:0000:0000:0000:0001; The IPv6 loopback address is a great example of how IPv6 address compaction works.

The Linux and macOS program traceroute is known by a slightly different name on Windows. It's referred to as ______.

tracert; These programs operate slightly differently and have slightly different names.

The very first field in an IPv6 header is the _______.

version field; This field is used to indicate what version of IP is being used.

One of Level 3's public DNS servers is ____________.

4.2.2.3; Level 3's public DNS servers are 4.2.2.1 through 4.2.2.6

For all IPv6 addresses, the network ID is always the first ______ bits.

64; For all IPv6 addresses, the first 64 bits are the network ID and the last 64 bits are the host ID.

The organization responsible for DNS at a global level is ________.

ICANN; ICANN is responsible for DNS at a global level.

The protocol used to communicate network errors is known as __________.

ICMP, ICMP is used to communicate errors back to the client.

Which two tools function similar to traceroute? Check all that apply.

Pathping; Pathping runs for 50 seconds and then displays the final aggregate data all at once. mtr; The mtr command works in real time and will continually update its output with all of the current aggregate data.

Office 365 Outlook is an example of _______.

SaaS; Office 365 Outlook is an example of Software as a Service (SaaS).

On Windows, one of the tools you can use to verify connectivity to a specific port is ________.

Test-NetConnection ; Test-NetConnection lets you test many things, including connectivity to a specific port on a remote host.

A hybrid cloud is ________________.

a combination of a public cloud and a private cloud; A hybrid cloud runs some services on a cloud provider and some services in-house.

During a traceroute, which action does a router perform to the value in the Time To Live (TTL) field? subtraction, multiplication, addition, division,

addition; Not quite. Please review the videos in the "Verifying Connectivity" module for a refresher.

An IPv6 address is how many bits long?

128; An IPv6 address is 128 bits long

Following rules of compaction, the IPv6 address 2001:0db8:0000:0000:0000:ff00:0012:3456 could also be written as _______.

2002:db8::ff00:12:3456; IPv6 address compaction is a great way to shorten IPv6 addresses.

The ability for a protocol or program to determine that something went wrong is known as ________.

Error detection; Error detection is determining that an error occurred; error recovery is attempting to fix this error automatically.

When registering a new domain name, either the registrar's servers or self-owned servers can be used as name servers. What function will the name servers provide for the domain? address reservation, error recovery, authoritative, domain transfer

domain transfer; Not quite. Please review the videos in the "Digging Into DNS" module for a refresher.

The ping utility sends what message type?

echo request; By default, the ping utility sends an Echo Request ICMP message type.

A support technician uses the ping utility on a system that is online, yet no response is received. What should be allowed through a firewall, for ping to operate correctly? echo reply, echo request, ICMP, TTL

echo request; Incorrect Not quite. Please review the videos in the "Verifying Connectivity" module for a refresher.

You run the Test-NetConnection command on a Windows PC while only providing a host name. As a result, what default action does the command use?

echo request; When running the Test-NetConnection command on a Windows PC and only providing a host name, an Internet Control Message Protocol (ICMP) echo request (ping) is used.

Which Internet Protocol (IP) v6 header field is used to determine the quality of service level for a datagram?

flow label; The flow label field is used in conjunction with the traffic class field for routers, to make decisions about the quality of service level for a specific datagram.

The IPv6 header field that indicates how many routers can forward a packet before it's discarded is called the ________.

hop limit field ; The hop limit field configures how many routers can try to forward a packet before it's discarded.

A company runs sensitive technologies locally, while entrusting less-sensitive technologies to a broader user base. Which cloud delivery model is being used?

hybrid; A combination of cloud delivery models make up a hybrid type of deployment. In this case, both private and public models are being used.

A piece of software that runs and manages virtual machines is known as a __________.

hypervisor; A hypervisor manages many virtual instances running on a single host.

A tech uses the netcat tool on a Linux system. Of the choices, which has proper syntax?

nc google.com 80; The nc command requires that a host and a port are included.

.Question 2 A DNS resolver tool available on all major desktop operating systems is __________.

nslookup; nslookup is available by default on Windows, macOS, and Linux.

As an IT decision maker, you plan to satisfy business needs by using software as a service. Which option do you deploy?

office 365; Software as a Service (SaaS) is a model that uses cloud-based software, rather than locally installed software.

When shortening an Internet Protocol (IP) v6 address, which two rules are used? Check all that apply.

replace groups of zeros with colons; Any number of consecutive groups composed of just zeroes can be replaced with two colons. removing all leading zeros; When shortening an IPv6 address, you can remove any leading zeros from a group.

You need to prove ownership of a domain name for an upcoming transfer to a new registrar. Which Domain Name System (DNS) record do you create to prove ownership?

text (TXT); To prove ownership of a domain name, a DNS TXT record is commonly used.