network chapter 4
True
IP is an unreliable, connectionless protocol, as it does not establish a session to send its packets.
False
IPv4 and IPv6 use the same packet format.
True
The cost of upgrading infrastructure has been a major factor in the slow adoption of IPv6.
EIGRP may not be available on non-Cisco routers.
You have been tasked with the replacement of OSPF with EIGRP throughout your organization, which consists of a mixture of Cisco routers and routers from other vendors. What statement is accurate?
False
UDP provides error checking, but not sequencing.
OSPF requires very little CPU or memory resources.
Which statement does NOT accurately describe characteristics of the OSPF protocol?
BGP utilizes TCP for communicating updates.
Which statement regarding the Border Gateway Protocol (BGP) is accurate?
traceroute -I srv1.mycompany.com
Which traceroute command will perform a trace using ICMP echo requests instead of UDP datagrams to the host srv1.mycompany.com?
show ip route
You are connected to your network's Cisco router, and need to verify the route table. What command should you enter?
The MTU for the network can be as high as 9198 bytes.
You have been tasked with maintaining a network that is jumbo frame enabled. What does this mean?
1500 bytes
By default, what is the MTU size on a typical Ethernet network?
1522 bytes
If the VLAN tag is present in an Ethernet frame, what is the maximum frame size?
flow label
In IPv6, what field is used to indicate what sequence of packets from one source to one or multiple destinations a packet belongs to?
sliding-window
In a TCP segment, what field indicates how many bytes the sender can issue to a receiver before acknowledgment is received?
True
In general, a Layer 3 or Layer 4 switch is still optimized for fast Layer 2 data handling.
The hosts will still send and receive traffic, but traffic may not always reach the correct destination.
In the event of a duplicate MAC address shared by two hosts on a switched network, what statement is accurate?
An IS-IS capable network router.
Originally codified by ISO, what does the "intermediate system" in IS-IS (Intermediate System to Intermediate System) stand for?
False
Routing Information Protocol (RIP) is an interior gateway protocol that uses a link-state algorithm.
link-state protocols
Routing protocols that enable routers to communicate beyond neighboring routers, allowing each router to independently map the network, are known as which type of protocols?
False
TCP uses a four-step process called a four-way handshake to establish a TCP connection.
True
The Border Gateway Protocol is considered to be a hybrid routing protocol.
False
The CTRL + S key combination can be used to stop an actively running command.
TCP
The IP connectionless protocol relies on what other protocol to guarantee delivery of data?
False
The pathping utility sends 10 pings per hop by default.
hop limit
What IPv6 field is similar to the TTL field in IPv4 packets?
netstat -n
What command will list only current connections, including IP addresses and port numbers?
Differentiated Services (DiffServ)
What field in an IPv4 packet informs routers the level of precedence they should apply when processing an incoming packet?
The router drops the packet and sends an ICMP TTL expired message back to the host.
What happens when a router receives a packet with a TTL of 0?
Framing
What is NOT one of the three characteristics of TCP in its role as a reliable delivery protocol?
It is the time it takes for the protocol to recognize the best path in the event of a network change.
What is routing protocol convergence time defined as?
It allows the receiving node to determine whether the TCP segment became corrupted during transmission.
What is the purpose of the checksum TCP field?
Each node on the network waits a random amount of time and then resends the transmission.
What occurs when a collision happens on a network?
EIGRP
Which routing protocol started as a Cisco proprietary protocol and combines some of the features of a link-state protocol with that of distance-vector protocols?
latency
What routing metric affects a path's potential performance due to delay?
By default, the tracert utility uses ICMP echo requests, while traceroute uses UDP datagrams or TCP SYN messages.
What statement regarding the differences between the Windows tracert utility and the Linux/UNIX/macOS traceroute utility is accurate?
tcpdump port 22
What tcpdump command can be used to filter out all traffic except SSH traffic?
mtr
What utility is the equivalent to the pathping command on a Linux system?
15
When using the Routing Information Protocol (RIP), what is the maximum number of hops a message can take between its source and its destination before the destination is considered unreachable?
netstat -s
Which command will produce statistics about each message transmitted by a host, separated according to protocol type?
A router forwards broadcasts over the network.
Which of the following is not a task handled by a router?