Networking concepts

A company moves to a hosted email and office suite. Users sign in through a browser, and the provider runs and patches everything, including the application. Which service model is this?

Application servers in a private cloud subnet must download updates from the internet, but must not accept connections started from the internet. What should the subnet's default route point to?

A company links its head office network to its cloud VPC with an encrypted site-to-site tunnel across the internet. Which cloud component ends the tunnel on the cloud side?

A retailer runs its main systems in its own data center and adds capacity from a public cloud provider during the holiday peak. Which deployment model is this?

Developers upload application code to a cloud platform that provides the runtime, operating system and scaling. They never manage servers. Which service model is this?

A hospital builds a self-service cloud in its own data center, used only by its own departments. Which deployment model is this?

A startup runs all its servers on a cloud provider's infrastructure, which the provider shares among many customers. Which deployment model is this?

A link must run past large motors in a factory that cause heavy electromagnetic interference. Which medium is unaffected by EMI?

A technician connects a cable modem to the provider's coaxial wall outlet with a threaded connector. Which connector is this?

Every branch office has one WAN link to head office, and traffic between two branches passes through head office. What is the main weakness of this topology?

Which statement correctly compares multimode fiber with single-mode fiber?

A DSL modem connects to the analog telephone wall jack. Which connector does that cable use?

Every PC in an office has its own cable to one central switch. If one PC's cable is cut, only that PC loses its connection. Which topology is this?

In a three-tier campus design, which layer connects end-user devices such as PCs, phones and access points?

A host sends an ARP request asking which device owns 192.168.1.1. How is that request delivered on the local network?

Which device separates broadcast domains by default, so a broadcast on one interface is not forwarded out of the others?

Employees' web requests go to a server that fetches pages on their behalf, caches popular content and blocks banned categories. What is this server?

A small office wants a single appliance on the LAN that shares folders to Windows and Linux clients using SMB and NFS. Which device fits best?

At which OSI layer are data formats translated, for example character encoding and compression, so the receiving application can read them?

What is the protocol data unit called at the transport layer when TCP is used?

Which OSI layer sets up, maintains and tears down the dialog between two applications?

An administrator opens an SSH session from her laptop to one specific server. Which traffic type is this?

A web application firewall blocks requests based on URL paths and HTTP headers. At which OSI layer does it inspect traffic?

A campus has 120 lightweight access points. The team wants to push SSID settings, firmware and channel plans to all of them from one place. Which device provides this?

A secondary DNS server fails to copy the zone from the primary. Ordinary name lookups to the primary work. A firewall between them allows only UDP 53. What should be added?

A company moves its public website from HTTP to HTTPS. Which port must the edge firewall now allow to the web server for encrypted traffic?

An application queries a directory server for user and group information on TCP 389. Which protocol is it using?

A directory server is configured to accept only LDAP over TLS. Which port will clients connect to by default?

A help desk technician needs to open a graphical remote session to a Windows server. A firewall rule for TCP 3389 has just been added. Which protocol does this rule allow?

A company's mail server delivers a message to a partner organization's mail server across the internet. Which protocol and default port does it use?

A packet capture of a remote terminal session to a router on TCP port 23 shows the administrator's password in readable text. Which protocol was used?

Under classful addressing, what is the default subnet mask for the network 150.10.0.0?

A technician wants to test the local TCP/IP stack on a PC without sending any traffic onto the network. Which address should she ping?

Which CIDR prefix is the same as the mask 255.255.240.0?

A laptop with the address 10.20.30.40 browses a public website. Which statement about its address is true?

Which of the following addresses is in an RFC 1918 private range?

A /24 network is divided into equal /27 subnets. How many subnets result, and how many usable hosts does each have?

A router must advertise one summary route covering 192.168.0.0/24, 192.168.1.0/24, 192.168.2.0/24 and 192.168.3.0/24, and nothing else. Which summary should it use?