NETWORK PLUS CHAPTER 3
As a network support technician, you only need to know how to support IPv6.
'False
IPv4 and IPv6 use the same packet format.
'False
UDP provides error checking, but not sequencing.
'False'
On IPv4 networks, IGMP operates at the Network layer of the OSI model to manage multicasting.
'True'
By default, the pathping command sends how many pings per hop?
100
Which layers of the OSI model are all routers able to interpret?
3, 4
A modern ASN consists of how many bits?
32
In IPv6, what field is used to indicate what sequence of packets from one source to one or multiple destinations a packet belongs to?
flow label
What two fields below are used by IPv4 and IPv6 respectively to limit the number of times that a packet can be forwarded on a network?
hop limit, TTL
The receiving host de-encapsulates the message at each layer in Answer order and then presents the payload to the receiving application.
reverse
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
What field in an IPv4 packet informs routers the level of precedence they should apply when processing an incoming packet?
Differentiated Services (DiffServ)
What protocol replaces ARP, IGMP, and ICMPv4 on IPv6 based networks?
ICMPv6
What IPv4 protocol handles multicasting for tasks such as videoconferencing or teleconferencing?
IGMP
What versions of the IP protocol are used on networks today?
IPv4, IPv6
At what layer of the OSI model would a TCP or UDP header be added to a payload?
Layer 4
What address does ARP work in conjunction with IPv4 to discover?
MAC, physical
ICMP (Internet Control Message Protocol) is a Answer layer core protocol that reports on the success or failure of data delivery.
Network
What parameter can be combined with the traceroute command to instruct it to use ICMP echo requests instead of UDP datagrams?
-I
What netstat command option lists only current connections, including IP addresses and port numbers?
-n
Which of the following is not a task handled by a router?
A router forwards broadcasts over the network.
What is NOT one of the three characteristics of TCP in its role as a reliable delivery protocol?
Framing
What happens when a router receives a packet with a TTL of 0?
The router drops the packet and sends an ICMP TTL expired message back to the host.
The TCP Answer is performed before TCP transmits
Three-way handshake
IP is an unreliable, connectionless protocol.
True
___'s lack of sophistication makes it more efficient than TCP.
UDP
What routing protocol criteria is defined as the time it takes to recognize a best path change in the event of a network outage?
convergence time
Which of the following are types of entries an ARP table contains?
Static, Dynamic
The IP connectionless protocol relies on what other protocol to guarantee delivery of data?
TCP
When viewing the routing table on a UNIX system, what flag indicates if a route is a usable route?
U
What TCP field below allows the receiving node to determine whether a TCP segment is corrupted during transmission?
checksum
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
What command can be used on a Cisco router to view the routing table?
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?
sliding window
