Network+ Guide to Networks 7th Edition Chapter 3

Which of the following is not a task handled by a router? A router can connect dissimilar networks. A router can reroute traffic if the path of first choice is down but a second path is available. A router forwards broadcasts over the network. A router can interpret Layer 3 and often Layer 4 addressing.

A router forwards broadcasts over the network.

What parameter can be combined with the traceroute command to instruct it to use ICMP echo requests instead of UDP datagrams? -I -d -p -n

-I

In IPv6, what field is used to indicate what sequence of packets from one source to one or multiple destinations a packet belongs to? traffic exchange flow label group ID traffic class

flow label

The receiving host de-encapsulates the message at each layer in _______ order and then presents the payload to the receiving application.

reverse

A _______ joins two or more networks and passes packets from one network to another.

router

Which network routing protocol is a path vector protocol that sends updates between routers using TCP? BGP OSPF RIP IS-IS

BGP

True of False: UDP provides error checking, but not sequencing.

False

True or False: As a network support technician, you only need to know how to support IPv6.

False

True or False: IPv4 and IPv6 use the same packet format.

False

What protocol replaces ARP, IGMP, and ICMPv4 on IPv6 based networks? ICMPv6 BGPv6 IGMPv6 ARPng

ICMPv6

What IPv4 protocol handles multicasting for tasks such as videoconferencing or teleconferencing? ARP TCP IGMP ICMP

IGMP

At what layer of the OSI model would a TCP or UDP header be added to a payload? Layer 4 Layer 1 Layer 7 Layer 2

Layer 4

ICMP (Internet Control Message Protocol) is a _______ layer core protocol that reports on the success or failure of data delivery.

Network

The IP connectionless protocol relies on what other protocol to guarantee delivery of data? ARP UDP ICMP TCP

TCP

What command can be used on a Cisco router to view the routing table? route print netstat -r route show ip route

show ip route

In a TCP segment, what field indicates how many bytes the sender can issue to a receiver while acknowledgement for the segment is outstanding? urgent pointer URG flag sliding window sequence number

sliding window

What happens when a router receives a packet with a TTL of 0? The router marks the packet as corrupted and forwards it to the next hop. The router attempts to forward the traffic on a local network The router drops the packet and sends an ICMP TTL expired message back to the host. The router resets the TTL to 128.

The router drops the packet and sends an ICMP TTL expired message back to the host.

The TCP ___________________ is performed before TCP transmits the actual data

Three-way handshake

True of False: On IPv4 networks, IGMP operates at the Network layer of the OSI model to manage multicasting.

True

True or False: IP is an unreliable, connectionless protocol.

True

When viewing the routing table on a UNIX system, what flag indicates if a route is a usable route? H U G I

U

___'s lack of sophistication makes it more efficient than TCP.

UDP

What TCP field below allows the receiving node to determine whether a TCP segment is corrupted during transmission? checksum TCP header length sliding window acknowledgement number

checksum

What routing protocol criteria is defined as the time it takes to recognize a best path change in the event of a network outage? administrative distance detection overhead calculation convergence time downed path detection

convergence time

What type of routing protocol enables routers to communicate beyond neighboring routers, allowing each router to create a map of an entire network? link state distance vector map extension exterior gateway

link state