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Worksheetscoursera 2 course 1 test
Total questions: 51
Worksheet time: 27mins
Which four (4) factors does a stateless firewall look at to determine if a packet should be allowed pass?
if the packet belongs to an open session
the destination port
the destination IP address
the service or protocol used
the source IP address
Can a single firewall conduct both a stateless and stateful inspection?
No, stateless and stateful firewalls are distinctly different and used for different purposes.
Yes but not on the same packet. A decision is made which type of inspection will be most effective on a packet-by-packet bases.
No, the latency created by a double inspection is too great to be practical.
Yes, the stateless inspection is conducted first and then a stateful inspection is done.
Yes, the stateless inspection is conducted first and then a stateful inspection is done.
True
False
Network Address Translation (NAT) typically conducts which of the following translations?
An IP address to a physical address and vice versa.
A MAC address to an IP address and vice versa.
An IP address to a domain name and vice versa.
A private network IP address to a public network IP address and vice versa.
Which type of NAT routing allows one-to-one mapping between local and global addresses?
Static
Kinetic
Dynamic
Overload
Which network layer do IP addresses belong to?
The Application Layer
The Data Link Layer
The Physical Layer
The Network Layer
Which address assures a packet is delivered to a computer on a different network segment from the sender?
The DHCP Address
The DNS Address
The MAC address
The IP Address
A network device that is capable of sending and receiving data at the same time is referred to as which of the following?
Full duplex
Half duplex
Monoplex
Unidirectional
True or False: Collision avoidance protocols are critical to the smooth operation of modern networks.
True
False
Comparing bridges with switches, which are three (3) characteristics specific to a bridge?
Each port is dedicated to a single device; bandwidth is not shared.
Half-duplex transmission.
End-user devices share bandwidth on each port
Virtual LANs are not possible.
Full-duplex transmission.
True or False: Switches solved the problem of network loops and improved performance of multicast/broadcast traffic.
True
False
If a network server has four (4) network interface cards, how many MAC addresses will be associated with that server?
4
2
1
0
True or False: When you connect your laptop to a new network, a new IP address must be assigned, either automatically or manually.
True
False
What does the Address Resolution Protocol (ARP) do when it needs to send a message to a location that is outside its broadcast domain?
ARP looks up the address in the ARP Table.
ARP drops the packet as undeliverable.
ARP sends a message to the destination IP address asking for its MAC address.
ARP sends the message to the MAC address of the default gateway.
Routing tables are maintained by which of the following devices?
Only on routers.
Only on routers, switches, and hubs.
On any network connected device.
Only on routers and network gateways.
What is the purpose of a default gateway?
It translates IP addresses to MAC addresses and vice versa.
It manages all network traffic.
It forwards messages coming from, or going to, external networks.
It manages network traffic on the local subnet only.
If a message is being sent to a computer that is identified in the computer's routing table, what type of connection would be established?
Dynamic
Default
Static
Direct
What is meant by "stateless" packet inspection?
It is the inspection of packets by non-state actors, such as private telecom companies.
It is the inspection of a packet's service or protocols used only.
It is a packet-by-packet inspection with no awareness of previous packets.
It is the inspection of a packet's source and destination IP addresses only.
True or False: An Intrusion Detection System (IDS) is generally a passive device that listens to network traffic and alerts an administrator when a potential problem is detected?
True
False
True or False: The primary difference between an Intrusion Detection System (IDS) and an Intrusion Prevention System (IPS) is that an IDS is designed as a passive system that listens and alerts while an IPS is an active system that is designed to take action when a problem is detected?
True
False
Which intrusion system does not add any delay to network traffic?
Intrusion Prevention System (IPS).
Intrusion Detection System (IDS).
How does using Network Address Translation (NAT) provide an additional layer of security to your network?
By assigning a different false IP address to traffic leaving your network and translating it back to the real internal IP addresses on incoming traffic.
By requiring a certificate exchange to authenticate the source of external IP addresses before allowing them through the firewall.
By blocking traffic from known malware sites.
By hiding the real IP addresses of all the devices on your private network and exposing only a single public IP address.
Which type of NAT routing maps unregistered IP addresses to a single registered IP address allowing thousands of users to be connected to the Internet using only a single global IP address?
1 point
Static
Kinetic
Dynamic
Overload
Which network layer do MAC addresses belong to?
The Data Link Layer.
The Application Layer.
The Network Layer.
The Physical Layer.
Which address assures a packet is delivered to a computer on the same network segment as the sender?
The DNS address.
The IP address.
The MAC address.
The Gateway address.
A network device that cannot send and receive data at the same time is referred to as which of the following?
Unidirectional
Half duplex
Full duplex
Monoplex
When a NIC reads a packet header and sees the destination address is not its own address, what does it do with the packet?
It returns the packet to the sender with a delivery error message.
It discards the packet.
It reads the contents of the packet.
It forwards the packet to the correct address if it is in the same network or the gateway if it is not.
Comparing bridges with switches, which are three (3) characteristics specific to a switch?
Each port is dedicated to a single device; bandwidth is not shared.
Half-duplex transmission.
Virtual LANs are possible.
Full-duplex transmission.
End-user devices share bandwidth on each port.
True or False: Switches can connect two geographically dispersed networks.
True
False
A network interface card's MAC address is also known by which two (2) of the following ? (Select 2)
The logical address.
address.
The IP address.
The burn address.
The physical address.
What is the main function of the Address Resolution Protocol (ARP)?
To translate a physical address to an IP address and vice versa.
To translate a logical address to an IP address and vice versa.
To translate a MAC address to an IP address and vice versa.
To translate a gateway address to an IP address and vice versa.
What does a router do when it needs to send a packet to an address that is not in its routing table?
It returns the packet to the sender to deal with.
It drops the packet as undeliverable.
It sends out a broadcast message looking for the correct system to reply with a confirmation message.
It forwards the packet to the default gateway.
What happens to messages sent from a computer that has no gateway address specified?
Messages sent to other computers on the same subnet will not be delivered but those destined to computers on other networks will be delivered.
Messages sent to other computers on the same subnet and those destined to computers on other networks will be delivered.
No messages will be delivered.
Messages sent to other computers on the same subnet will be delivered but those destined to computers on other networks will not be delivered.
Which three (3) are types of routes found in a routing table?
Local
Remote
Direct
Default
Dynamic
The binary (base 2) number "0101" is how much in decimal (base 10)?
3
1
5
9
The IP address range goes from 0.0.0.0 to 255.255.255.255 and is known as the "four octets". Why are these 4 numbers called octets?
The inventor noted the similarity to the "octives" in piano music.
The number 255 in decimal takes up 8 digits in binary.
This was the eighth version of the IP address range to be adopted by the Internet Standards Committee (and the first to gain widespread acceptance.)
They form a total of 8 subranges.
How many octets are used to define the network portion of the IP address in a Class C network?
0
1
2
3
True or False: A routable protocol is a protocol whose packets may leave your network, pass through your router, and be delivered to a remote network.
True
False
True or False: The destination address is defined in the packet header but the source address is in the packet footer.
True
False
Which network mask belongs to a Class A network?
0.0.0.0
255.255.255.255
255.0.0.0
255.255.255.0
IPv6 changes the IP address from a 32 bit address used in IPv4 to a 128 bit address. This results in which of the following?
Many billions of times as many possible IP addresses.
Four times as many possible IP addresses.
The same number of possible IP addresses, but expressed with greater precision.
The same number of possible host addresses but many more network addresses.
Which IPv4 addressing schema would you use to send a message to select group systems on the network?
Multicast
Simulcast
Unicast
Broadcast
True or False: Utilities such as TFTP, DNS and SNMP utilize the UDP transport protocol.
True
False
True or False: The UDP transport protocol is faster than the TCP transport protocol.
True
False
Which four (4) of these are characteristic of the UDP transport protocol?
No flow control
Ordered data; duplicate detection
Connectionless
Unordered data; duplicates possible
Unreliable
What is the primary function of DNS?
To assign domain names to new endpoints.
To convert MAC addresses to domain names and vice versa.
To filter out domains not authorized access to the local network.
To translate domain names to IP addresses and vice versa.
How does a new endpoint know the address of the DHCP server?
The DHCP server is always located on the gateway.
The administrator must input the IP address of the DHCP server in the endpoint's network configuration.
The endpoint sends a DHCP Discover broadcast request to all endpoints on the local network.
The endpoint sends an inquiry to the gateway and the gateway responds with the address of the DHCP server.
Which Syslog layer contains the actual message contents?
Syslog Message
Syslog Transport
Syslog Content
Syslog Application
True or False: Setting the correct Syslog Severity Level on systems helps keep the Syslog server from being flooded by the millions of messages that could be generated by these systems.
True
False
True or False: The Syslog message typically includes the severity level, facility code, originator process ID, a time stamp, and the hostname or IP address of the originator device.
True
False
Why is port mirroring used?
To provide an independent data stream for when two processes must operate on the same incoming data.
To provide a stream of all data entering or leaving a specific port for debugging or analysis work.
To make the network more reliable by providing a redundant path for all traffic destined for a specific port.
To make the network faster by providing two parallel ports through which data can flow.
