Network+ Chapter 4

ARP table

A database of records that maps MAC addresses to IP addresses. The ARP table is stored on a computer's hard disk where it is used by the ARP utility to supply the MAC addresses of network nodes, given their IP addresses.

AS (autonomous system)

A group of networks, often on the same domain, that are operated by the same organization.

You are asked to install a device that will combine several connections to the Internet and provide the sum of the available network speeds to an internal network while equally sharing the data traffic among all the Internet connections. Which of the following devices are you asked to install? Wired controller Dual modem Multilayer router Multilayer switch Load balancer

load balancer

Which OSI layer is responsible for directing data from one LAN to another? Physical layer Network layer Transport layer Data Link layer

network layer

When a router can't determine a path to a message's destination, where does it send the message? Gateway of last resort Default gateway Administrative distance Routing table

gateway of last resort

Which of the following is true about the OSPF routing protocol? An OSPF maintains a network topology with only its directly connected networks. Each router is informed of the network topology up to its immediately adjacent neighbors. Each router has a partial knowledge of the network topology. Each router has complete knowledge of the network topology.

Each router has complete knowledge of the network topology.

A routing protocol's reliability and priority are rated by what measurement? AD Routing table MTU Latency

AD

In which of the following applications can a virtual IP address be used?

Gateway Redundancy Protocols NAT

Which two protocols manage neighbor discovery processes on IPv4 networks? BGP and OSPF IPv4 and IPv6 ICMP and ARP TCP and UDP

ICMP and ARP

You manage a small stub network that has a router configured with static routing. If the connection to the next hop goes down, what action will the router perform?

It will continue to route traffic on the same path.

What field in a TCP segment is used to determine if an arriving data unit exactly matches the data unit sent by the source? Checksum DiffServ Acknowledgment number Source port

checksum

A router receives a packet with a destination address that is not found within its routing table. The router is configured to send all such packets to a specific next hop address. What is this next hop address called?

default route

At which OSI layer does IP operate? Transport layer Application layer Data Link layer Network layer

network layer

What kind of route is created when a network administrator configures a router to use a specific path between nodes? Best path Trace route Default route Static route

static route

Which protocol's header would a Layer 4 device read and process? HTTP ARP TCP IP

TCP

What is the Internet standard MTU? 65,535 bytes 1,522 bytes 1,500 bytes 9,198 bytes

1500 bytes

ARP (Address Resolution Protocol)

A core protocol in the TCP/IP suite that belongs in the Data Link layer of the OSI model. ARP works in conjunction with IPv4 to discover the MAC address of a node on the local network and to maintain a database that maps local IP addresses to MAC addresses.

AD (administrative distance)

A number indicating a protocol's reliability, with lower values being given higher priority. This assignment can be changed by a network administrator.

Which routing protocol does an exterior router use to collect data to build its routing tables? OSPF IP RIPv2 BGP

BGP

By default, which of the following components of the composite metric are considered for Enhanced Interior Gateway Routing Protocol (EIGRP) ?

Bandwidth and delay

If you have a small Routing Information Protocol (RIP) network of 10 hops, how will RIP prevent routing loops?

By implementing a limit on the number of hops allowed in a path

Which of the following statements is true about Fault tolerance?1) It is a direct result of the design of the network itself.2) It is the name of the feature that allows for dual layer 2 connections between switches.3) Enables a network to continue functioning normally in case of a partial failure.

Statements 1 and 3 are true