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If a host on a network has the address 172.16.45.14/30, what is the address of the subnetwork to which this host belongs?
172.16.45.12
A suffix of /30 has a 252 in the fourth octet.
This means we have a block size of 4 and our subnets are 0, 4, 8, 12, 16, etc.
Address 14 is obviously in the 12 subnet.
A company interested in cloud computing is looking for a provider who offers a set of basic services such as virtual server provisioning and on demand storage that can be combined into a platform for deploying and running customized applications.
What type of cloud computing model fits these requirements?
Infrastructure as a Service
What are two functions of a router?
It connects multiple IP networks so multiple devices can use the same Internet connection
It determines the best path to send packets
It manages traffic between these networks by forwarding data packets to their intended IP address
Refer to the exhibit below
Router B has to forward an IP datagram to 10.10.10.10
Which of the interfaces will be used by router B when forwarding this datagram?
E0
Refer to the exhibit.
A company uses the address block of 128.107.0.0/16 for its network.
What subnet mask would provide the max number of equally sized subnets while still providing enough host addresses for each subnet in the exhibit?
255.255.255.255.128
The largest subnet in the topology has 100 hosts in it so the subnet mask must have at least 7 host bits in it (2^7-2=128-2=126).
255.255.255.0 has 8 hosts bits, but this does not meet the requirement of providing the maximum number of subnets.
A technician can ping the IP address of the web server of a remote company but cannot successfully ping the URL address of the same web server.
Which software utility can the technician use to diagnose the problem?
nslookup
Any technician will be able to ping the IP address of a particular web server of any remote company. But he cannot ping the address of the URL of the same server successfully.
nsloolup will help the technician in diagnosing this particular problem.
How does TCP typically begin a session?
The three-way handshake:
Client sends the SYN set to server
The server responds with the SYN/ACK set
The client acknowledges with ACK
What mechanism is used by a router to prevent a received IPv4 packet from traveling endlessly on a network?
It decrements the value of the TTL field by 1.
If the result is 0, it discards the packet and sends a Time Exceeded message to the source host.
Which two statements are true regarding link-state routing protocols?
They are aware of the complete network topology
They offer rapid convergence times in large networks
You download a file from an FTP website on the Internet.
What is the highest layer in the OSI model used in this FTP operation?
Application
T/F - A communications protocol (protocol) is a set of rules that every computer follows to transfer information
True
What is the name for information that is transmitted at the network layer of the OSI model?
A packet
T/F - On GCP, a more restrictive child policy can overrule a less restrictive parent policy
False
Which of the following best characterizes TCP versus UDP (in most cases)?
TCP is slower, more reliable, and requires more overhead since it manages message acknowledgment and retransmissions in case of lost parts.
You have an Ethernet network.
Which of the conditions below can lead to increased congestion on your network?
The Addition of Hubs to the Network.
Refer to the exhibit.
PC A sends a request to Server B.
What IPv4 address is used in the destination field in the packet as the packet leaves PC A?
192.168.12.16
T/F - Except for disk usage, Compute Engine instances only charge for resources while they're running
True
Which statement best describes the Software as a Service cloud delivery model?
An application delivered to the client from the cloud which eliminates the need to install and run the application on the customer's own computers and simplifying maintenance and support.
Refer to the exhibit.
The IP address of which device interface should be used as the default gateway setting of host H1?
RI: G0/0
Explanation:
The default gateway for host H1 is the router interface that is attached to the LAN that H1 is a member of. In this case, that is the G0/ interface of R1.
H1 should be configured with the IP address of that interface in its addressing settings. R1 will provide routing services to packets from H that need to be forwarded to remote networks.
When does IP fragmentation occur?
When there are more bytes in the IP packet than the size of the Maximum Transmission Unit of all links from sender to receiver.
Also when packets are broken up into smaller pieces (fragments) so they can pass through a link at a smaller maximum transmission unit (MTU) than the original (larger) packet size.
Note 
Flashcard (72)