Chapter 3
offsite
In a SaaS solution, where are a company's applications hosted?
proxy server
Refer to the exhibit. In the topology shown, what is the most likely type of network appliance labeled as "Network Appliance X?"
EDNS
What variant of Domain Name System (DNS) overcomes the size limitations of the original version of DNS through the use of pseudo-resource-records?
virtual switch
What virtual network component allows virtual servers located on the same physical server to be logically separated into different VLANs?
virtual desktop
What virtual network service stores user data and the GUI in a data center, as opposed to the hard drive in a user's computer?
AAAA
Which of the following DNS record types is an IPv6 address record?
proxy server
Which of the following network appliances is used to restrict clients from accessing certain URLs on the Internet?
VPN concentrator
Which of the following network appliances performs the most processor-intensive tasks and is critical in IPSec environments?
ARP
Which of the following protocols resolves an IP address of a network device to a corresponding MAC address?
Plenum
Which type of cable might be required for installation in a drop ceiling, which is used as an open-air return duct?
MTRJ
Which type of fiber optic connector contains two fiber strands in a single connector?
DHCPDISCOVER
A DHCP reservation involves the exchange of four messages between a DHCP client and a DHCP server. What is the first of these messages?
lease
A DHCP server can be used to assign a temporary IP address to a DHCP client, as opposed to a network administrator statically configuring an IP address on that client. What is this temporary IP address assignment called?
scope
A DHCP server uses a pool of addresses (which typically corresponds to a single subnet) to assign IP address to DHCP clients on a specific network segment. What is a common name for this pool of addresses?
intermediate distribution frames
A building might have multiple patch panels (for example, on different floors of a building). These common locations, where cables from nearby office home back to, are often called what?
wiring closet
A location within a building where network cables terminate is commonly called a(n) __________.
12
A router has 12 ports. How many broadcast domains does the router have?
Destination IP address
A router operating at Layer 3 primarily makes its forwarding decisions based on what address?
12
A switch has 12 ports. How many collision domains does the switch have?
patch panel
Cables in wiring closets commonly terminate on what?
com
Consider the fully-qualified domain name (FQDN) http://sample.pearsonitcertification.com. What is the root domain in the FQDN?
D. A scope acts as a pool of IP addresses from which a DHCP server can assign IP addresses to DHCP clients.
Identify the purpose of a DHCP scope.
C. Switches usually have higher port densities than bridges. D. Switches use ASICs to make forwarding decisions, whereas bridges make their forwarding decisions in software.
Identify two differences between an Ethernet bridge and an Ethernet switch.
reservation
Most DHCP client devices on a network are dynamically assigned an IP address from a DHCP server (that is, dynamic addressing). However, some devices (for example, servers) might need to be assigned a specific IP address. What DHCP feature allows a static IP address to MAC address mapping?
. DHCP relay agent
Refer to the exhibit. Consider the topology. What needs to be configured on router R1 in order for the DHCP client to successfully send a DHCPDISCOVER message to the DHCP server?
content engine
Refer to the exhibit. In the topology, "Network Appliance X" receives content coming over a WAN from the HQ server and stores that content locally. This allows devices at the Branch Office site to get their content directly from this network appliance, without burdening the WAN. What type of network appliance is Network Appliance X?
load balancer
Refer to the exhibit. In the topology, "Network Appliance X" takes requests coming into the server farm and spreads those requests out over all of the available servers (which contain identical content). What type of network appliance is Network Appliance X?
VPN concentrator
Refer to the exhibit. In the topology, what type of network appliance is located at each of the sites?
A DHCP lease is a temporary assignment of IP address information to a DHCP client.
What is a DHCP lease?
A DHCP reservation is a static mapping of an IP address to a specific MAC address.
What is a DHCP reservation?
DHCPDISCOVER
What is the first DHCP message sent by a client attempting to obtain IP address information from a DHCP server?
Category 6a
What is the minimum category of unshielded twisted pair (UTP) cable that can be used for 10GBASE-T networks?
the color coding
What is the primary difference between the TIA/EIA-568-A and TIA/EIA-568-B wiring standards?
Content switch
What specialized network device is commonly used to load balance traffic across multiple servers in a group?
virtual server
What virtual network device allows Microsoft Active Directory (AD) services, UNIX-based web services, and DNS services to be co-resident on the same network device?
Switch
Which network infrastructure device primarily makes forwarding decisions based on Layer 2 MAC addresses?
CNAME
Which of the following DNS record types is an alias of an existing record?
MX
Which of the following DNS record types is used for an e-mail server?
A
Which of the following DNS record types is used to map a hostname to an IPv4 address?
PTR
Which of the following DNS record types points to a canonical name and is commonly used when performing a reverse DNS lookup?
SOA
Which of the following DNS record types provides authoritative information about a DNS zone (for example, the e-mail address of a DNS zone's administrator, the zone's primary name server, and various refresh timers)?
.edu .com
Which of the following are examples of root domains?
B. DHCPACK C. DHCPREQUEST D. DHCPDISCOVER
Which of the following are valid DHCP message types used during a DHCP reservation?
VPN concentrator firewall router
Which of the following can often be categorized as an encryption device (that is, a device capable of participating in an encrypted session)?
Cat 5e Cat 6
Which of the following categories of UTP cabling are commonly used for 1000BASE-T networks?
MDF
Which of the following connects to multiple intermediate distribution frames?
RJ-45
Which of the following copper connector types is an eight-pin connector found in most Ethernet networks?
RJ-11
Which of the following copper connector types is found in most home telephone networks?
F-connector
Which of the following copper connector types is most commonly used for cable TV connections?
SIP
Which of the following is a VoIP signaling protocol used to set up, maintain, and tear down VoIP phone calls?
66 block
Which of the following is a cross-connect block that was popular for cross-connecting Cat 3 UTP cables for 10 Mbps Ethernet LANs, but does not support higher-speed LAN technologies, such as 100 Mbps Ethernet LANs?
It allows traffic to travel securely over an untrusted network (for example, the Internet).
Which of the following is a primary benefit of a VPN concentrator?
It reduces bandwidth demand on an IP WAN.
Which of the following is a primary benefit of a content engine?
It hides inside addresses from the public Internet.
Which of the following is a primary benefit of a proxy server, assuming the proxy server is only performing proxy services?
PaaS
Which of the following is a technology that allows a company to use development resources owned and maintained by a service provider?
NaaS
Which of the following is a technology that allows a service provider to offer networking services to customers?
hosted PBX
Which of the following is a telephony solution that is typically based on a traditional privately-owned telephone system?
SIP
Which of the following is a voice over IP (VoIP) signaling protocol used to setup, maintain, and tear down VoIP phone calls?
proxy server
Which of the following network appliances acts as a relay for packets traveling between a network's clients and the Internet and is not focused on tunneling?
load balancer
Which of the following network appliances is also known as a content switch?
MMF
Which of the following specifies a type of fiber optic cable that has a core whose diameter is large enough to transport light arriving at a variety of angles (that is, more than one mode of propagation)?
SMF
Which of the following specifies a type of fiber optic cable that has a core whose diameter is only large enough to transport light arriving at one angle (that is, one mode of propagation)?
RG-6
Which of the following standards specifies a type of coaxial cable commonly used by local cable companies to connect individual homes to the cable company's distribution network?
RG-59
Which of the following standards specifies a type of coaxial cable used for short distance applications, such as carrying composite video between two nearby devices, and has a characteristic impedance of 75 Ohms?
SaaS
Which of the following technologies is used by an application service provider (ASP) to give subscribers access to application software?
LC
Which type of fiber optic connector connects to a terminating device by pushing the connector into the terminating device and can be removed by depressing the tab on the connector and pulling it out of the terminating device?
ST
Which type of fiber optic connector is often referred to as a bayonet connector?
SC
Which type of fiber optic connector, containing one fiber optic strand per connector, is connected by pushing the connector into a terminating device and can be removed by pulling the connector from the terminating device?
plenum
Which type of twisted pair cable has an insulator that is fire retardant and minimizes the emission of dangerous fumes in the event of fire?
Category 6
Which type of unshielded twisted pair (UTP) cable is commonly used for 1000BASE-T Ethernet networks and is often made of relatively thick conductors (for example, 22 gauge or 23 gauge wire) and thick insulation?
Category 5
Which type of unshielded twisted pair (UTP) cable uses 24 gauge wiring and is commonly used in Ethernet 100BASE-TX networks, which carry data at a rate of 100 Mbps, although it is capable of carrying traffic at a rate of 155 Mbps on older implementations of ATM networks? (NOTE: This type of UTP should not be used for networks running at speeds of 1 Gbps or higher.)
Category 3
Which type of unshielded twisted pair (UTP) is commonly used in Ethernet 10BASE-T networks, which carry data at a rate of 10 Mbps (although it can carry data at a maximum rate of 16 Mbps, as seen in some Token Ring networks)?
A router resides between a DHCP client and a DHCP server.
Why might a network using DHCP for IP address assignment need a DHCP relay agent?
