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Free Practice Quiz Question List

4 Network Services and Modern Architectures Online Quiz Questions

Use this free practice quiz with 20 questions to review 4 Network Services and Modern Architectures, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

In a cloud network, does a route to an Internet gateway alone guarantee that every host in the subnet is publicly reachable?

  1. A

    True

  2. B

    False

02
True or false
1 point

Does NAT alone provide a complete firewall or security policy for a network?

  1. A

    True

  2. B

    False

03
Written response
1 point

A systems administrator finds that clocks on several servers are out of sync, making it difficult to correlate event logs. Which protocol should the administrator check?

04
Written response
1 point

A firewall rule is needed for LDAP protected with TLS. What is its commonly associated TCP port number?

05
Fill in the blank
1 point

In the first two steps of the DHCP DORA exchange, the client sends , and the server replies with .

06
Fill in the blank
1 point

A cloud route table needs a default route that matches unmatched IPv4 destinations. Enter the route value: .

07
Choose one
1 point

Users can reach an internal server by IP address but not by hostname. Which troubleshooting action best addresses this symptom?

  1. A

    Replace the server's subnet mask because hostname access depends on that setting.

  2. B

    Check the client’s DNS server, the relevant record, and whether a stale cache or incorrect DNS suffix is involved.

  3. C

    Disable NAT because DNS names are translated at the network edge.

  4. D

    Increase the DHCP lease duration because hostnames are stored in the lease.

08
Choose one
1 point

A subnet has no local DHCP server, and its clients must obtain leases from a server on another subnet. What should the network administrator configure?

  1. A

    Configure NAT overload on the client so its DHCP broadcast can reach the server.

  2. B

    Add an MX record for the DHCP server.

  3. C

    Configure a DHCP relay agent to forward requests between the subnet and the remote server.

  4. D

    Configure NTP to repeat the DHCP request on the remote subnet.

09
Choose one
1 point

An organization needs both an organized store of information about users and computers and a way for applications to access that information. Which statement correctly describes the roles of a directory service and LDAP?

  1. A

    LDAP stores the directory data, and a directory service is the protocol used to query it.

  2. B

    A directory service stores organized information about network objects, and LDAP is a protocol for accessing directory services.

  3. C

    A directory service translates hostnames, and LDAP assigns IP addresses to clients.

  4. D

    LDAP is a routing protocol, and a directory service selects packet next hops.

10
Choose one
1 point

Application servers are in a private cloud subnet. They need outbound Internet access for updates, but should not have a direct inbound Internet route. Which design meets these requirements?

  1. A

    Add a direct inbound Internet route to the subnet and remove its security rules.

  2. B

    Place every server on a public IP address and remove the route table.

  3. C

    Route outbound traffic through a NAT gateway or another controlled path while keeping no direct inbound Internet route.

  4. D

    Disable all routing so the subnet is private but can still reach the Internet.

11
Choose all
1 point

Select all accurate DNS record and function pairings.

  1. A

    A and AAAA records map a name to an IPv4 or IPv6 address.

  2. B

    A CNAME record maps an alias to another DNS name.

  3. C

    An MX record identifies mail exchangers for a domain.

  4. D

    A PTR record supports reverse lookup from an address to a name.

  5. E

    An NS record identifies the mail exchangers for a domain.

  6. F

    An SOA record maps an alias to another DNS name.

12
Choose all
1 point

In AWS, select all statements that correctly describe the scope and statefulness of security groups and network ACLs.

  1. A

    Security groups apply to network interfaces and are stateful.

  2. B

    Network ACLs apply at the subnet boundary and are stateless.

  3. C

    Security groups apply at the subnet boundary and are stateless.

  4. D

    Network ACLs apply to network interfaces and are stateful.

13
Open ended
1 point

Design a cloud network for a web application that has a public-facing load balancer and application servers that should not be directly exposed to the Internet. The application servers also need permitted outbound access for updates. Describe where to place each component, how to provide outbound access, and how to restrict traffic to the application servers.

14
Written response
1 point

A DNS entry should make shop.example.net an alias for store.example.net, so that the alias points to another DNS name. Which record type should be used?

15
True or false
1 point

In a cloud virtual network, adding a route from a subnet to an internet gateway by itself guarantees that every host in that subnet is publicly reachable.

  1. A

    True

  2. B

    False

16
Written response
1 point

A firewall must allow a client to connect to a directory service using LDAP protected with TLS. What common TCP destination port should the rule allow?

17
Choose one
1 point

Employees inside an organization and visitors outside it query the same hostname but intentionally receive different IP addresses. Which explanation best fits this design?

  1. A

    The public DNS record is necessarily stale.

  2. B

    Split DNS is configured to return different answers in different network contexts.

  3. C

    The hostname must use a CNAME record.

  4. D

    The resolver is bypassing the authoritative name servers.

18
Choose one
1 point

Several private hosts need to access public websites through one public IPv4 address. Which mechanism allows the edge device to distinguish their outbound connections and direct replies to the right hosts?

  1. A

    Static NAT, which assigns each host its own public address.

  2. B

    A DNS MX record that directs traffic to the router.

  3. C

    PAT, which distinguishes connections using transport-layer ports.

  4. D

    A DHCP reservation that maps each host to a public address.

19
Choose one
1 point

Clients on a VLAN receive no DHCP offers, and the DHCP server is on a different routed subnet. Which configuration is most directly needed to pass the clients’ requests to that server?

  1. A

    A DNS resolver that forwards the client’s hostname.

  2. B

    A NAT gateway that assigns addresses from a cloud subnet.

  3. C

    A DHCP reservation that broadcasts the server’s address.

  4. D

    A DHCP relay agent that forwards requests to the remote server.

20
Choose one
1 point

Users can reach general network resources, but domain joins and directory sign-ins are failing. Which check is especially relevant because the directory service may need to be located by name?

  1. A

    Verify that clients can resolve the names needed to locate directory services.

  2. B

    Replace the directory service with a DHCP reservation.

  3. C

    Disable the directory’s group information and retry the sign-in.

  4. D

    Change the NAT translation table before checking name resolution.